BC Science 10 Textbook Outline - askmryuen.com

BC Science 10 Textbook Outline - askmryuen.com BC Science 10 Textbook Outline 1.1 BIOMES p. 8 WORDS TO KNOW , abiotic , adaptation , biome , biotic , climate , climatograph Introducing the Biomes of the World Factors that influence the Characteristics and distribution of Biomes Temperature and precipitation How to use the graph Latitude Elevation Ocean currents Climatographs Adaptations and Biomes A Survey of Biomes Tundra Boreal Forest Temperate Deciduous Forest Temperate Rainforest Grassland (Temperate and Tropical) Tropical Rainforest Desert (hot and cold) Permanent Ice (Polar Ice) 1.2 Ecosystem p: 34 Words to know: , commensalisms , competition , ecosystem , mutualism , niche , parasitism , predation - 1 - Parts of an Ecosystem , An ecosystem has abiotic components such as oxygen, water, nutrients, light, and soil that interact with biotic components such as plants, animals, and micro-organisms. Within ecosystems are habitats. , A habitat is the place in which an organism lives. Abiotic Interactions in Ecosystems , Abiotic components of an ecosystem includes non living substances such as oxygen, water, nutrients, light, and soil. , Nutrients such as nitrogen and phosphorus are chemicals that are required for plant and animal growth. , Photosynthesis is a chemical reaction that converts solar energy into chemical energy usable by plants. , Soil is an important part of terrestrial ecosystems. It provides nutrients for plants and supports many species of small organisms. Biotic Interactions in Ecosystems , A species is a group of closely related organisms that can reproduce with one another. , population refers to all the members of a particular species within an ecosystem. , A community is all the populations of the different species that interact in a species area or ecosystem. , These biotic interactions are sometimes ordered in an ecological hierarchy of organism, population, community, and ecosystem. Biotic Interactions in Populations , Three kinds of interactions in ecosystems are commensalisms, mutualism, and parasitism Symbiotic Relationships , Symbiosis refers to the interaction between members of two different species that live together in a close association. Commensalism Commensalism is a symbiotic relationship in which one species benefits and the other species is neither helped nor harmed. Mutualism Mutualism is a symbiotic relationship in which both organism benefit. Parasitism Parasitism is a symbiotic relationship in which one species benefits and another is harmed. Niches , a special role an organism plays in an ecosystem, including the way in which it contributes to and fits into its environment. - 2 - Competition , Competition is a harmful interaction between two or more organism that can occur when organisms compete for the same resource (such as food) in the same location at the same time. Predation , in ecology, predation is the term used to describe predator-prey interactions in which one organism (the predator) eats all or part of another organism (the prey). Biodiversity in Ecosystems , A land area or water body that has a large variety of organisms, or great biodiversity, is often an indicator of the health of an ecosystem. 2.1 Energy Flow in Ecosystems p. 56 Words to know , Biodegradation , Consumers , Decomposers , Food chain , Food pyramid , Food web , Producers , Trophic level How Energy Flows in Ecosystems Food Chains and Food Webs Food Pyramids 2.2 Nutrient Cycles in Ecosystems p. 68 Words to know: , Cellular respiration , Denitrification , Nitrification , Nutrients , Photosynthesis , Sedimentation , Weathering - 3 - The Cycling of Nutrients in the Biosphere , Nutrients are chemicals that are required for plant and animal growth and other life processes. , Stores are nutrients that are accumulated for short or long periods of time in Earth’s atmosphere, oceans, and land masses. , Nutrient cycles are the way nutrients are cycled in the biosphere; the continuous flows (exchanges) of nutrients in and out of stores. The Effect of Human Activities on Nutrient Cycles The Carbon, Nitrogen, and Phosphorus Cycles The Carbon Cycle How carbon in stored Sedimentation is the process that contributes to the formation of sedimentary rock. Carbonate is a combination of carbon and oxygen (CO32+) that is dissolved in ocean water. How carbon is cycled through ecosystems Photosynthesis Photosynthesis is a chemical reaction that converts solar energy into chemical energy. Cellular respiration Cellular respiration is the process in which both plants and animals release carbon dioxide back into the atmosphere by converting carbohydrates and oxygen into carbon dioxide and water. Decomposition Other ways carbon is cycled through ecosystems Human Activities and the Carbon Cycle The Nitrogen Cycle How nitrogen is stored How nitrogen is cycled through ecosystems Nitrogen fixation Nitrogen fixations are the process in which nitrogen gas (N2) is converted into compounds that contain nitrate (NO3-) or ammonium (NH4+). - 4 - Nitrogen-fixing bacteria are bacteria that convert nitrogen gas (N2) into ammonium (NH4+) during decomposition, playing a significant role in nitrogen fixation. Nitrification and uptake How nitrogen is returned to the atmosphere Denitrification is the process in which nitrogen is returned to the atmosphere. Denitrifying bacteria are bacteria that convert nitrate (NO3-) back into nitrogen gas. How nitrogen is removed from ecosystems Human Activities and the Nitrogen Cycle The Phosphorus Cycle How phosphorus is stored Weathering is the process of breaking down rock into smaller fragments. Geologic uplift refers to the process of mountain building in which Earth’s crust folds, and deeply buried rock layers rise and are exposed. Human Activities and the Phosphorus Cycle How Changes in Nutrient Cycles Affect Biodiversity 2.3 Effects of Bioaccumulation on Ecosystems (p.92) Words to know: , Bioaccumulation , Bioremediation , Heavy metals , Keystone Species , Parts per million , PCBs How Pollutants Climb the Food Chain , Human activity can make natural disturbances such as forest fires and insect infestation much more worse. One of the biggest changes have been the introduction into the environment of synthetic (human made) chemicals. - 5 - Bioaccumulation , It is the gradual build up of these chemicals in living organisms. , Chemicals enter through by food intake, skin contact, or respiration. , Keystone species are species that can affect population numbers and health of an ecosystem. , Biomagnifications is the process in which chemicals not only accumulate but become more concentrated at each tropic level PCBs and the Orca , PCB’s (polychlorinated biphenyls) are synthetic chemicals that were widely used from 1930-1970 in industrial products such as heat exchange fluid, paint, plastic, and for electrical transformers. , Half life is the time it takes for the amount of a substance to decrease by half. Persistent Organic Pollutants , PCBs belong in a class of compounds called Persistent Organic Pollutants , (POPs).they are carbon-containing compounds that remain in water and soil for many years. , Chemical accumulation is measured in parts per million(ppm).one ppm means one particle of a given substance mixed with 999 999 other particles. Heavy Metals , They are metallic elements with a high density that are toxic to organisms at low concentrations. Within the biosphere, they do not degrade and cannot be destroyed. Lead , It is naturally present in all soils, generally in the range of 15 ppm to 40 pmm. However, these levels have increased due to human activities. Cadmium , It is found in earth’s crust and in released into the environment through rock weathering, volcanoes, and forest fires. Mercury , Every year, up to 6000 tonnes of mercury are released through natural sources such as volcanoes, geothermal springs, and rock weathering. - 6 - Reducing the Effects of Chemical Pollution , Scientist are constantly working to find new ways to solve these problems, one method is to trap it into soil. , Bioremediation is the use of living organisms (usually micro-organisms) to do the clean up naturally, only faster through biodegradation. 3.1 How Changes Occur Naturally In Ecosystems (p.108) Words to know , Adaptative radiation , Climax community , Ecological succession , Natural selection How Organisms Adapt To Change , Living organisms change as the abiotic and biotic components in their environment change. The process that makes change possible in living things is called natural selection. How Ecosystems Change Over Time , Ecosystems are continually changing. The types of species that live in an ecosystem change as the abiotic factors in the ecosystem change. , Ecological succession is the term scientists use to refer to changes that take place over time in the types of organisms that live in the area. There are two types of ecological succession: primary succession and secondary succession. Primary Succession , Primary succession occurs in an area where no soil exists, such ad on bare rock. , Natural events such as retreating glaciers can scrape existing rock bare, or new rock can form when lava cools after a volcanic eruption. As dead lichens decay, they also add organic matter to the developing soil. Mature Communities , The process of primary succession leads to the development of a mature community, which is sometimes called a climax community. Boreal - 7 - , Forests, tropical rainforests, grasslands, and deserts are examples of climax communities . Previously ecologist s thought that climax communities would remain unchanged indefinitely. Secondary succession , Secondary succession occurs as a result of a disturbance to an area that already has a soil and was once the home of living organisms. Secondary succession occurs much faster than primary succession because soil and nutrient already exist. While primary succession may take hundreds of years to succession may take only decades. Secondary succession often depends on the recovery of existing plants, such as trees, and on species that can rapidly reproduce in new conditions of increased sunlight and open areas. How Natural Events Affect Ecosystems , Large disturbances such as forest fires have an impact on mature communities and result secondary succession. Flooding Flooding occurs in coastal areas , rivers, and lakes, when the volume of water exceeds the ability of the water body contain it. Climate change may be causing an increase in flooding in some parts of the world. Tsunamis Tsunami is the term used to describe a huge, rapidly moving ocean wave. Tsunamis are usually caused by large earthquakes or underwater volcanic eruptions. Drought Drought is recurring event in many parts of the world. Drought usually occurs when there is a below-average amount if precipitation in an area over a period of many months or years. Insect Infestations Insects play a major role in the natural succession of a forest. In a mature coniferous forest, for example, the mountain pine beetle destroys older, weaker pines. The dead trees provide food and shelter for some species, and eventually the nutrients of the tree are recycled in the soil. - 8 - 3.2 How Humans Influence Ecosystems. Page 122 Words to know , Contamination , deforestation , extinction , habit loss , soil degradation , resource exploitation , sustainability , traditional ecological , knowledge Understanding Sustainability , Sustainability is recycling and reusing materials which are very important. , Sustainability means to sustain ecological process, using material resources that maintains ecosystem health for the future. The Effects of land and Resource Use , Use of land is usually used for urban development agriculture, industrial, ining and forestry. Resource use is described as, using resources that we obtained. Resources include, coal, timber, minerals, fish, manufactured goods, and agricultural products. Habitat Loss , Habitats that are destroyed, usually by human activities is the definition of Habitat Loss , When destroyed, habitats can no longer support the animals that lived there in the past. Habitat loss usually leads to Habitat Fragmentation. Some habitats may not be repaired. , Habitat Fragmentation refers to land being divided into smaller groups it affects wildlife because it tampers with, plant pollination, seed dispersal, wildlife movement, animal reproduction, and plant reproduction. The Effects of Deforestation , Deforestation is the practice known which forest are logged or cleared for human use and never replanted. , Soil Degradation can occur when water and wind erosion removes topsoil from bare land. The Effects of Agriculture - 9 - , Soil compaction occurs when soil particles are squeezed together and the air spaces between the particles are reduced . Aeration, in which small plugs of soil are mechanically removed, is , Compaction is one method that reduces run- off by improving the movement if air and water though all. The Effects of Resource Exploitation , Resources use is also referred to as resource exploitation. Examples include harvesting fish and timber, mining coal and minerals, and extracting oils and gas. , Contamination is the introduction of chemicals, toxins, wastes, or micro-organisms into the environment in concentrations that harmful to living things. Overexploitation Overexploitation is the use or extraction of resources until it is depleted. Overexploitation can result in extinction. Extinction is the dying out of a species. The Effects of overexploitation on food webs Overexploitation affects many interactions in food webs, and sometimes the effects take decades to appear. Resources Management and Traditional Ecological Knowledge , The Tl'azt'en First nation 's through understanding of the plants, animals, and and natural occurrences in their forest environment is referred to Traditional Ecological Knowledge 3.3 How Introduced Species Affect Ecosystems Words to Know: , Introduced species , Invasive species , Native species The Impact of Introduced Invasive Species , Native species are organisms that naturally inhabit an area. , Introduced species or foreign species are introduced into an ecosystem and are usually beneficial or harmless. , Invasive species are organism that can take over the habitat of native species or invade their bodies, weakens immune systems. , Invasive species often have high reproduction rates, aggressive competitors and lack natural predators in new habitats. - 10 - Competition Introduced invasive species compete against native species for essential resources such as food and habitat. Predation Predators can have more impact on a prey population than native predators Yellow crazy ants devour all plants and also prey on the young of reptiles, birds, and mammals. Yellow ants have killed 20 million land crabs. Red crabs are keystone species; they reduce leaf litter and recycle nutrients for rainforest tree seedlings. Disease and parasites Invasion of parasites causes viruses and bacteria can weaken the immune responses. Weakening provides opportunities for less dominant species to out compete other. Habitat alteration Invasive species can make a natural habitat unsuitable for native species by changing its structure or composition. - change the light levels - decrease oxygen in water - change soil chemistry - increase soil erosion - upset the balance of nutrient cycle - pollination - energy flow. Saving an Ecosystem under Siege , The Gulf Islands and pockets of the Fraser Valley are one of the most biologically rich ecosystems and most threatened. , Due to habitat loss, 5% of the original ecosystem remains relatively undisturbed. , Major threat coming from introduced invasive species. , One of the toughest species to control is scotch broom. - bushy shrub produced up to 18 000 seeds per plant - yellow flower attract bees for pollination - well adapted for surviving drought - 11 - - fixes nitrogen in the soil - Creates an overload of nitrogen that interferes with the growth of some native species. , Grey squirrel and the gypsy moth are animal invaders. - grey squirrel out compete the red squirrels for acorns - grey squirrel is also better adapted to survive habitat destruction - gypsy moth larvae can strip the oak tree of leaves o without leaves for photosynthesis, the tree eventually dies 4.1 Atomic Theory and Bonding P.168 Words to know. , Atomic number , Bohr diagram , Compounds , Covalent bonding , Ionic bonding , Ions , Lewis diagram , Molecule , Valence electrons Atomic Theory , Subatomic particles are particles that make up an atom , Scientist found that individual atoms are composed of 3 subatomic particle which are protons, neutrons and electrons - Protons are subatomic particles that have a 1+ electric charge - Neutrons are subatomic particles that do not have an electric charge - Electrons are subatomic particles that have a 1- electric charge - Protons and neutrons are held tightly together at the centre of the atom in a tiny region called the nucleus - Electrons exist in the region around the nucleus in regular patterns called shells or energy levels - Most of the volume of an atom is the region occupied by its electrons - Every neutral atom of the same element contains an equal number of protons and electrons. Since a proton counts as a 1+ electric charge and an electron counts as 1- electric charge, the charges add up to zero, making an atom uncharged or neutral. - 12 - The Nucleus , The centre of each atom is a nucleus , Depending on element it would take between 10 000 and 100 000 nuclei lined up in a row to stretch across the diameter of one atom , The nuclei of atoms of all other elements contain both protons and neutrons. , Atoms with fewer than 30 protons the number of neutrons and the number of protons present in the nucleus are roughly equal , Extra neutrons help make the nucleus stable by keeping the protons as far apart as possible , High repulsion between the protons makes heavy atoms unstable , Nuclear charge is the term given to the electric charge on the nucleus, and it is simply found by counting the number of protons , Nuclear charge is same as atomic number Organization of the Periodic Table , Each element is listed according to its atomic number, left to right across each row and then row by row form top to bottom , Row is called period each column is called group or family , Metals are on the left side and in the middle of the table. Non-metals are in the upper right corner. The metalloids form a staircase toward the right side , Elements in the same chemical group or family have similar chemical properties - The alkali metals ( very reactive) - The alkaline earth metals ( somewhat reactive metals ) - The halogens ( very reactive on metals) - The noble gases ( very un-reactive gaseous none metals) - The block of elements from group 3 through group 12 are collectively called the transition metals. they include familiar elements such as iron nickel copper silver and gold The periodic table and ion formation , When atoms gain or lose electrons they become electrically charged particles called ions. , Metals atoms for example lose electrons to form positively charged ions called cations , Common ions formed by elements are sometimes shown in the upper right hand corner of the element’s box in the periodic table , Some metals are multivalent , means they can form ions in more than one way depending on the chemical reaction they undergo , Most common charge is listed first at the top of the element’s box , Non-metals also form ions , Since non-metal atoms have less exceptions, gain electrons they form negative ions called anions - 13 - Bohr Diagrams , Bohr diagram is a diagram that shows how many electrons are in each shell surrounding the nucleus , Bohr’s diagram is named in honour of Niels Bohr a Danish physicist who developed several models for showing the arrangements of electrons in atoms , The first shell can hold up to 2 electrons , The second shell can hold up to 8 electrons Patterns of Electron Arrangement in Period , Period number of an element equals the number of occupied shells of it’s atom , Elements in period one have 1 occupied shell , Elements in period two have 2 occupied shells. , As you move left to right on across period 2 1 more electron is added to the 2nd shell of each atom , Arrangement of eight electrons in the outermost shell is called a stable octet.( octet refers to 8) , Elements in period 3 have 3 shells. Patterns of electron arrangement in groups , Outermost shell that contains electrons is called the valence shell , Electrons in the valence shell is called the valence electrons , Valence electrons involved chemical bonding , Atoms in group 1 only have 1 valence shell , Atoms in group 2 have 2 valence shell , Group 13 have 3 valence shell , Group 14 have 4 electrons and so on thought group 8 , Electrons in completed shells appears in pairs Forming compounds , When two atoms move close together their valence electrons interact , Chemical bond forms between the atoms if the new arrangement of atoms and electrons is stable , Stability of atom ion or compounds is related to its energy ; lower the states are more stable , When an atom forms a compound it may acquire a valence shell like that it closet noble gas in one of 3 ways - Atoms of metal may lose electrons to other atoms forming cation - Atom if non-metals may gain electron from other atom forming anions - Atom may share electrons Ionic bonding , Compounds are 2 basic types ionic and covalent , Ionic compound contains a positive charge and negative charge , Ionic bonding one more electrons transfer forms each atom of the metal to each atom of the non metal - 14 - Covalent bonding , Atoms of many non-metals shares electrons with other non-metal atoms , Covalent bonding atoms overlap slightly and one unpaired electron from each atom will pair together , Both atoms are attracted to the same pair of electrons forming a covalent bond , Covalent compound is formed when non-metallic atoms share electrons to form covalent bond , Covalent molecule is a group of atoms in which the atoms are bound together by sharing one or more pairs of electrons , Pairs of electron involved in a covalent bond are sometimes called the bonding pair , Pair of electrons in the valence shell that is not used in bonding is sometimes called alone pair Lewis diagram , Diagram hat illustrates chemical bonding showing only an atom’s valence electron and the chemical symbols , Lewis diagrams are sometimes called Lewis structures or electron dot diagram , Dots representing electrons are placed around the element symbols at the point of the compass , Electrons dots are placed singly until the fifth electron reached then they are paired Lewis diagrams of ions , You can uses theses rules to draw a ion in Lewis diagram , Positive ion one electron dot is removed from the valence shell for each positive charge of the ion. , For negative ions one electron dot is added to each valence shell for each negative charge of the ion Lewis diagram of diatomic molecules , You can use Lewis diagrams to help explain why some of the non-metal elements exist as diatomic molecules. , Diatomic molecule is a pair of atoms that are joined by covalent bonds , Diatomic elements form this way because the two-atom molecules are more stable than the individual atom 4.2 Names and Formulas of Compounds p.184 Words to know: , Binary covalent compound , Ionic compounds , Polyatomic , Subscript - 15 - The Chemical name of an Ionic Compound , Ionic Compounds are composed of positive and negative ions , Ionic compounds can be described by using a name or a formula. , One rule for the name of an ionic compound is that it has two parts, one for each type of ion in it. , The non-metal’s name always ends with the suffix “-ide.” E.g. Iodine is changed to iodide. The Chemical formula of an Ionic Compound , The chemical formula of an ionic compound has a symbol to identify each ion. , The formula also shows the number of ions each element has in a compound. Naming Ionic Compounds , Determining the name of an ionic compound is easy when you analyze the formula of said ionic compound in three steps: 1. Name the metal ion. 2. Name the non-metal ion by ending the element name with the suffix “ide.” 3. Write the name of the compound. Writing the Formulas of Ionic Compounds , In an ionic compound, positive charges balance negative charges. One could use this ratio to write subscripts in the formula. Writing the formulas of ionic compounds containing two elements has four crucial steps: 1. Identify each ion and its charge. 2. Determine the total charges needed to balance positive with negative. 3. Note the ratio of positive ions to negative ions. 4. Use subscripts to write the formula. ( a 1 is not shown in subscripts) Compounds Containing a Multivalent Metal , Some metals are multivalent. This means that they can form ions in more than one way, depending on the situation. Formulas of Compounds Containing a Multivalent Metal , Writing formulas of compounds containing a multivalent metal is simple when you use these four steps: 1. Identify each ion and its charge. 2. Determine the total charges needed to balance positive with negative. 3. Note the ratio of positive ions to negative ions. 4. Use subscripts to write the formula. ( a 1 is not shown in subscripts) Naming Compounds that contain a Multivalent Metal , Use these six steps to name ionic compounds containing a multivalent metal: 1. Identify the metal. 2. Verify that it can form more than one kind of ion by checking the periodic table. 3. Determine the ratio of the ions in the formula. 4. Note the charge of the negative ion from the periodic table. 5. The positive and negative charges must balance out. Determine what the charge needs to be on the metal ion to balance the negative ion. 6. Write the name of the compound. - 16 - Polyatomic Ions , A polyatomic ion is an ion composed of more than one type of atom joined by covalent bonds. Names and Formulas of Covalent Compounds , In a Covalent compound the precise number of atoms of each element on the molecule is shown by the chemical formula. Naming Binary Covalent Compounds , A binary covalent compound contains two non-metal elements joined together by one or more covalent bonds. Atoms in covalent compounds do not connect by forming ions instead, they combine chemically by sharing electrons in a covalent bond. Comparing Ionic and Covalent Compounds , The formulas of ionic compounds and covalent compounds can look very similar. This makes naming them difficult if you are not sure which naming rules to use. The following three tips are useful for naming compounds. 1. Examine the formula • Ionic compounds begin with a metal or the ammonium ion. • If the formula starts with a non-metal, it is likely that it is a covalent compound. 2. If the compound is covalent • If the covalent compound is binary (and does not begin with hydrogen) then use the prefix naming syste. 3. If the compound is ionic • If the positive ion is a metal, the periodic table will show whether it has one or more than one form of charge. • If the negative ion comes from a single non-metal aton the suffix “-ide.” • If the negative ion is a polyatomic ion, look up the formula on table 4.11, Names, Formulas, and Charges of some Polyatomic Ions, on page 192. 4.3: Chemical Equations (p. 202) WORDS TO KNOW: , balanced chemical equation: , hemical equation , chemical reaction , conservation of mass , products , reactants , skeleton reaction , symbolic equation - 17 - Conservation of mass in chemical change , atoms rearrange themselves during chemical reactions , no atom was created or destroyed , total number of atoms at beginning = total number of atoms at the end The law of conservation of mass , total mass doesn’t change during a chemical change , mass is conserved in chemical reaction , total mass of products= total mass of reactants , atoms are neither made nor destroyed Writing and balancing chemical equations , simplest form= word equation , skeleton equation: shows formula of reactants and products , balanced chemical equation: shows identities of substances & matching numbers of atoms on both sides Counting atoms to balance an equation Hints for writing word equations , use chemical symbols for most of the elements when they are not in a compound , 3 common elements containing hydrogen: methane, ammonia, water , 7 common diatomic elements (elements that go by 2 atoms when they are not in a compound) Strategies for balancing equations , balance compounds first and elements last , add coefficients only in front of formula, don’t change subscript , balance hydrogen and oxygen last , count polyatomic ions as a unit Hints for balancing equations , determine the correct coefficient for each chemical symbols - 18 - 5.1 Acids and Bases (pg 220) Words to Know , acids , bases , bromothymol blue , concentration , indigo carmine , litmus paper , methyl orange , pH indicators , phenolphthalein pH Values of Common Substances , The pH scale measures how acidic or basic a solution is. , Anything with less than 7 on the pH scale is considered an acid. , Solutions with pH 7 is considered neutral Using the pH Scale pH Indicator , pH indicators are chemicals that change colour depending on the pH of the solution. , Litmus paper has dried litmus on it to determine if a solution is acidic or basic. Other pH indicator , Not all pH indicators change colour like litmus. Phenolphthalein is an example. , Some acid-based indicators are bromothymol blue, indigo carmine, methyl orange, and methyl red. Acids Names of acids Bases Production of Ions Properties of Acids and Bases - 19 - 5.2 Salts (pg.234) Words to Know , metal oxide , neutralization(acid base) , non-metal oxide , oxide , salts Acid-Base Neatralization , Neutralization(acid-base)- name for type of chemical reaction that occurs when acid and a base react to form a salt and water Metal Oxides and Non-Metal Oxides , Oxide- chemical compound that includes at least one oxygen atom or ion along with one or more other elements , Metal oxide- chemical compound that contains a metal chemically combined with oxygen. , Non-metal oxide- chemical compound that contains a non-metal chemically combined with oxygen Acids and Metals Acids and Carbonates Chapter 5.3 Organic Compounds (p. 244) Words to know: , Alcohol , Hydrocarbon , Inorganic , Organic , Organic Chemistry , Solvent Recognizing Organic Compounds Hydrocarbons , Hydrocarbon Alcohols , Alcohol , Solvent - 20 - 6.1 Types of Chemical Reactions (Page 257) Words to Know , synthesis , decomposition , single and double replacement , neutralization (acid and base) , combustion Classifying Chemical Reactions , There are six types of chemical reactions: synthesis, decomposition, single replacement, double replacement, acid-base neutralization and combustion , these represent the thousands of reactions that happen. Synthesis (Combination) Reactions , In a synthesis reaction, two reactants (A and B) combine to produce the product AB. , Element + element , ionic compound | A+B , AB o -example: 2Na+Cl,2NaCl , When synthesis reaction happens between metal + non-metal, electrons are transferred from the metal to the non-metal, producing ions. , reactions that produce oxides can all be classified as synthesis reactions. , for ionic compounds, using ion charges you can predict the product and write the equation. , for covalent compounds/multivalent metal you need extra info to write the equation. (I.e.: gold, copper) Decomposition Reactions , Decomposition is breaking down of a compound into smaller compounds or separate elements , reverse of synthesis reaction , Compound,element + element | AB , A + B o -example: 2NaCl,2Na + Cl2 , Electrons transfer back to the atoms of the metal and each element becomes electrically neutral , none of the products is an ion. Single Replacement Reactions , Single replacement reaction is when a reactive element (metal/non-metal) and a compound react to produce another element and compound , Element + compound , element + compound A + BC , B + AC where A is a metal OR A+ BC , C + BA where A is a non-metal example: 2Al+ 3CuCl , 3Cu + 2AlCl 23 - 21 - Double Replacement Reactions , Double replacement involves two ionic solutions that react to produce two other ionic compounds. , One produces a precipitate (insoluble solid) that forms from solution. , precipitate floats in solution, then settles and sinks at bottom. , Ionic solution + ionic solution , ionic solution + ionic solid , AB (aq) + CD (aq) , AD (aq) + CB (s) ) + 2NaI , 2NaNO + PbI. -example: Pb (NO3232 Neutralization (Acid-Base) Reactions , When an acid and base are combined, they will neutralize each other. , In neutralization, acid and base will form a salt and water. , acid + base , salt + water , HX + MOH , MX + HO 2 example: HSO4 + Ca(OH) , CaSO+ 2HO. 224 2 Combustion Reaction , Combustion is the rapid reaction of a compound or element with oxygen to form an oxide and to produce heat/can form Co2 and H2O as well. , Hydrocarbon + oxygen , carbon dioxide + water , CH + O , CO + H0. ( and represent integers) XY222XY example: CH + 2O , CO + 2HO. (methane) 4222 Summary of Chemical Reaction Types , summary of each reactant and products. (chart) Solutions to Practice Problems , solutions to practice problems. 6.2 Factors Affecting the rate of chemical reactions (pg.272) Words to Know , catalyst , catalytic converter , rate of reaction , surface area Temperature , Rate of reaction- the rate a reactant turn into a product hemist control the rate of a chemical reaction by controlling the temperature , C , Heat causes particles of the reactants to move more quickly - 22 - Concentration , is how much solute is dissolved in a solution , Greater concentration among reactant atoms=greater chance of collisions , Concentration of substance can change if in aqueous solution /in gas state Surface area , surface area -measure of how much area of an object is exposed , Many small particles have more surface area than solid blocks made of the same material , If both reactants are gases/ liquids that mix= no surface Presence of a catalyst , catalyst- a substance that speeds up the rate of a chemical reaction , the body contains thousands of different biological catalyst called enzymes , enzymes are large organic molecules which speed up reactions in living cells , energy is needed to break bonds in any chemical reaction Catalytic converters , Catalytic converter- a stainless steel device, located underneath the frame of the vehicle , inside is a large surface area for reactants to take place , the surface of honeycomb is coated with metallic catalysts, platinum, rhodium, and palladium , carbon monoxide is produced from gasoline, reacts with oxygen to produce carbon dioxide and water 2NO, 2N+3O,2322 7.1 Atomic Theory, isotopes, and radioactive decay Words to Know , Radioactivity is the release of high-energy particles and rays of energy from a substance as a result of changes in the nuclei of its atoms. , The stream of high-energy, fast-moving particles or waves that is found in our environment it called natural background radiation. , Radiation refers to high-energy rays and particles emitted by radioactive sources. , Isotopes are different atoms of a particular element that have the same number of protons but different numbers of neutrons. , Radioactive decay is the process in which unstable nuclei lose energy by emitting radiation. , Isotopes that are capable of radioactive decay are called radioisotopes. - 23 - Searching for Invisible Rays , German physicist Wilhelm Roentgen discovered that an unknown kind of energy was emitted form certain materials, and he called it x-rays which x stands for unknown. , Rowentgen’s work led to discovery of radioactivity by a French physicist Henri Becquerel. He discovered by chance that uranium salts emjitted rays that darkened photographic plates. , Chemist Marie Curie and her husband Pierre Curie used Becquerel’s mineral sample and isolated the components emitting the rays. Isotopes and Mass Number , Mass number = atomic number + number of neutrons , Number of neutrons = mass number- atomic number Representing Isotopes , Chemist represent isotopes using standard atomic notation, which is a shorten form involving the chemical symbol, atomic number, and mass number. , In nature, most elements are found as a mixture of isotopes. Radioactive Decay , Scientists studying radioactivity made an important discovery – that by emitting radiation, atoms of one kind of element can change into atoms of another element. , Radioactive atoms emit radiation because their nuclei are unstable Three Types of Radiation , Beta particles. , Gamma rays. , Alpha particles. 7.2 HALF LIFE p.302 Words to Know , Daughter isotope - -The stable product of a radioactive decay , Decay Curve -A curved line on a graph that shows the rate at which radioisotopes decay , Half Life -In biology; the time it takes for a living tissue, organ, organism, or ecosystem to eliminate one half of a substance that has been introduced into it. In physics; the time required for half the nuclei in a sample of a radioactive isotope to decay which is a constant for any radioactive isotope. , Parent Isotope -The isotope that undergoes radioactive decay , Radiocarbon Dating -Determining the age of an object by measuring the amount of carbon-14 remaining in it. - 24 - Carbon Dating Rate of Radioactive Decay Using a decay curve Common Isotope Pairs The potassium-40 clock Using data from a potassium-40 clock 7.3 Nuclear Reactions (p.312) Words to Know , nuclear fission , nuclear reaction , chain reaction , CANDU , fusion Nuclear fission , nuclear fission – the splitting of a massive nucleus into two less massive nuclei, subatomic particles, and energy , all nuclear energy used for power generation anywhere in the world is through nuclear fission , heavy nuclei tend to be unstable , fission of a nucleus is accompanied by a very large release of energy , nuclear reactors make wastes that need to be stored safely for hundreds of thousands of years A review of chemical reactions , energy produced or used is so small that there is very little change is mass , in chemical reactions the mass is conserved , there are no changed in the nuclei , identities of atoms don’t change , involves electrons and rearrangements in a way atoms and ions are connected to each other Nuclear reactions , nuclear reaction – the process in which an atom’s nucleus changes by gaining or releasing particles or energy , can release one, two or all three types of subatomic particles , a small change in mass results in a large change in energy , nuclear fission of 1g of pure uranium-235 releases the same amount of energy as obtained from burning about 2 tonnes of coal , comparing chemical reactions with nuclear reactions - 25 - Nuclear equations for induced nuclear reactions , induced/forced/nuclear reaction - scientists can make a nucleus unstable and undergo a nuclear reaction immediately Subatomic particle symbols 1p, protons can be symbolized as 11, neutron is symbolized n 0 Rules for writing nuclear equations , the sum of the mass numbers on each side of te equation stays the same , the sum of the charges on each side of the equation stays the same Nuclear fission of uranium-235 , the repulsion between the positive charges are very great , collision that can happen at much lower energies involves a neutron colliding with a nucleus , nuclear fission of uranium-235 is the main nuclear reaction , when nucleus of uranium-235 is stuck by or bombarded with a neutron, the nucleus absorbs a neutron, mass number of the nucleus will increase by 1 but number of protons haven’t changed Chain reactions , chain reaction – an ongoing process in which one fission reaction initiates the next reaction , number of fissions and the amount of energy released can increase rapidly, can lead to violent nuclear explosion , materials that absorb neutrons could be used to control the chain reaction , much of the concern about nuclear power plants focuses on the risk of losing control of nuclear reactor , accident release of harmful levels of radiation/explosion CANDU reactors , CANDU – “Canadian deuterium uranium” reactors , Deuterium is an isotope of hydrogen -1, twice as heavy as it has both a proton and neutron in its nucleus , CANDU reactor is among the safest in the world, it can be shut down quickly if there is a problem , Nuclear power plants and fossil-fuel burning power plants are similar, they both produce a lot of heat Hazardous wastes , fuel used to produce heat in CANDU reactor is in a form of bundles of rods containing uranium pellets , each nuclear fuel bundle for about15 months , used bundles are highly radioactive , used bundles are stored in water pools at reactor for about 10 years before they can be transferred to shielded, above ground dry storage containers - 26 - , radioactivity of used fuel bundles decreases significantly with time but remain hazardous for thousands of years Nuclear fusion , fusion – process in which two low mass nuclei join together to make a more massive nucleus , occurs at the core of the sun and other stars , forces two nuclei of hydrogen to merge into a single nucleus , fusion nuclear equation , researchers have worked for over half a century to find technology that will extract energy from fusion reactions 8.1 The Language of Motion (P.344) Words to Know , Displacement , Distance , Position , Position-Time graph , Scalars , Slope , Uniform motion , vectors Direction makes a difference , Magnitude, size of a measurement , Scalars, magnitudes that don’t include directions , Vectors, magnitudes that include directions Representing Vectors , Vector symbols are bolded , Scalar symbols are not bold , Vector is abbreviated and in square brackets , Example = 10 Km east of house, 10 km [E] Distance , Speedometer measures how fast you are driving , Odometer keeps track of distance you traveled , Distance, scalar quantity that describes length of a path between 2 points or locations Position , Position, vector quantity that describes a specific point relative to reference point , Describes an object’s location seen by an observer - 27 - Time and Time Interval , Concept of time, describing when an event occurs , Time interval, difference between initial and final time , Symbol, Greek letter delta , Delta means symbol and change , The unit is measured in seconds Caculating the time interval , Skateboarder, time starts = initial time , Final time = when he stops , Skateboarder’s position changed , Position is measured from a location or origin Displacement and Distance , Displacement = straight-line distance and direction from 1 point to another , How much object’s position has changed. Watch for signs , Add magnitudes of positives for your total , Subtract initial position from the final position = Displacement , Vectors either positive or negative Uniform Motion , Ice rink, glide against ice , Slow down and stop = friction , Push off the boards, never stop = uniform , Uniform = unchanging motion , Close to being uniform = motion Graphing Uniform motion , Motion of ball represented in a motion diagram , Allows us to picture or visualize , Intervals to analyze the motion , Horizontal Axis = X axis, Vertical = Y axis Using a best-fit line - Scientific investigations often involve quantities that do not change - Real motion is not perfectly uniform - Best-fit line = smooth curve or straight line - Position-time graphs estimate positions and times - 28 - Slope , Slope = refers to whether a line is horizontal or angle Positive slope - Position-time graph slants up to the right - Increasing with respect of time Zero slope - Object at rest is represented by zero slope Negative slope - Slants to the right - The object is at a negative value 8.2 Average Velocity (p. 362) Words to Know , Speed- the distance an object travels during a given time interval divide by the time interval , Velocity- the displacement of an object during a time interval divided by the time interval , Average velocity- the rate of change in position for a time interval Speed and Velocity , Speed is a scalar quantity , Velocity is used to describe speed and the direction of motion , SI for speed is meters per second. (m/s) , Velocity is a vector quantity , SI unit for velocity is meters per second. (m/s) Same speed, different velocities - Objects traveling at the same speed can have different velocities - Distance measured in actual path that is taken - Displacement measured along a straight line joining the initial and final position. - Velocities change when magnitude or direction or both change Calculating the Slope of the Position- Time Graph , See page 365 Average Velocity , See page 365 - 29 - Position-time graph and average velocity , A position- time graph can contain positive, zero, and negative slopes. Table 8.2 Average velocity of an object Time interval t - 0 t –t t – t 12132 Velocity Positive Zero Negative Motion Moving away from Remaining Returning to the the origin at a stationary origin at a uniform uniform speed Converting between m/s and km/h , To convert km/h to m/s first you must change kilometers to meters then hours to s seconds. 1000m = 1 km 3600s = 1 h Calculating Average Velocity , Slope = rise / run Calculating Displacement , See page 369 Calculating Time , See page 369 9.1 Describing Acceleration (page 380-386) Words to Know , Acceleration , Change in velocity , Deceleration Positive and Negative Changes in Velocity , If the speed of the object changes or the direction of motion changes it is called a change in velocity Positive changes in velocity The change in velocity is positive when you speed up Negative changes in velocity The change in velocity is negative when you slow down Constant velocity Constant velocity is when you go in a straight line without turning and not changing the speed you are in the whole time - 30 - Non-Uniform Motion , The rate of an object change its velocity is acceleration Comparing acceleration - When acceleration of two object is compared the object with the greater acceleration changes its velocity in a shorter time interval or greater change in velocity during the same time interval Positive and Negative Acceleration , when the velocity of an object changes its motion is not uniform because it is accelerating. , Acceleration occurs when speed of an object changes or its direction of motion Positive acceleration - Acceleration can be both positive and negative - When the speed of the object increase the object has a positive acceleration Negative acceleration - When the speed of the object decrease the object has a negative acceleration - Acceleration that are opposite to the direction of motion is called deceleration Direction - When the acceleration is positive the direction of change in velocity of the object must be moving forward - When the acceleration is negative the direction of change in velocity of the object must be moving backward 9.2 Calculating Acceleration p. 392 Words to Know , Acceleration due to gravity , Air resistance , Average acceleration , Constant acceleration , Gravity , Velocity-time graph Velocity Time Graphs Velocity and best fit line - 31 - Determining Motion from a velocity time graph Calculating Acceleration Calculating Change in Velocity and Time Gravity and Acceleration Gravity and Air resistance Acceleration due to Gravity Calculating Motion due to Gravity 10.1 Temperature, Thermal Energy and Heat (p. 424) Words to Know , Conduction , Convection , Electromagnetic radiation , Heat , Kinetic energy , Kinetic molecular theory , Temperature , Thermal energy Temperature Temperature Scales Thermal Energy Heat Heat Transfer Conduction Convection Radiation - 32 - Section 10.2 Energy Transfer in the Atmosphere (p.436) Words to Know , atmosphere , Coriolis effect , hurricanes , kilopascals (kPa) , ozone layer , prevailing winds , sea breezes , thunderstorm , tornado The Origin of Earth’s Atmosphere The layers of the Atmosphere The troposphere The stratosphere The upper atmosphere Radiation and conduction in the Atmosphere The radiation budget Albedo What is weather? Atmospheric Pressure Measuring atmospheric pressure Altitude affects atmosphere pressure Temperature affects atmospheric pressure Humidity affects atmospheric pressure Movement of Air Masses High pressure systems Low pressure systems Prevailing Winds Local winds The Coriolis effect Global wind systems Jet Streams Fronts - 33 - Extreme Weather Tornadoes Tropical cyclones 11.1 Natural Causes of Climate Change (p. 464) Words to know: , Biogeoclimatic zone , Carbon sink , Carbon sources , El Niño , El Niño-Southern Oscillation (ENSO) , Greenhouse gases , La Niña , Natural greenhouse effect , Pale climatologists Describing Climate Looking forward by studying the past The Composition of Earth’s atmosphere Earth’s tilt, rotation, and orbit around the sun The water cycle Ocean currents El Niño and La Niña The carbon cycle Catastrophic events - 34 - 11.2 Human Activity and Climate Change (p. 482) Words to Know , Climate change , Enhanced greenhouse effect , General circulation models (GCMs) , Global warming , Global warming potential (GWP) , Permafrost , Precautionary principle Global Warming , Climate change affect the redistribution of thermal energy around Earth , Increase in global average temperature is called global warming The Enhanced Greenhouse Effect , The increase capacity of the atmosphere to absorb and emit thermal energy by in crease in greenhouse gases , Global warming potential (GWP) describes the ability of a substance to warm atmosphere by absorbing and emitting thermal energy. Carbon dioxide - Fossil fuels contains a lot of carbon, which is released when fuels are burned - Deforestation converts carbon sinks into carbon sources, adding the amount of carbon going in the atmosphere Methane - A gas, efficient at absorbing and emitting thermal energy - Less abundant than carbon and water vapour, but 25 times more powerful than carbon at absorbing and emitting thermal energy - Released during the process of animal digestion Nitrous oxide - Third-largest contributor to the enhanced greenhouse effect - Formed from biological process of bacteria in ocean water, soil, and manure Ozone - A molecule that occurs naturally in the stratosphere at altitudes between 10 km and 50 km - A layer of ozone is formed, which filters the harmful ultraviolet radiation from the sun - Ozone result from chemical reactions between sunlight and air pollution from burning fossil fuel - 35 - Chlorofluorocarbons - Group of human-made greenhouse gases with powerful global warming potential - made up of chlorine, fluorine, and carbon - used for coolants in refrigerators and air conditioners Albedo and Climate , albedo at earth’s surface affects the amount of solar radiation that’s a region receives , changes of the albedo at earth’s surface and affect the climate (Ex. If albedo in the artic drop, the ice would melt) The Role of Science in Understanding Climate Change , general circulation models (GCMs) are computer models designed to study climate , GCMs used for weather forecasting, climate analysis, and the climate change predictions The Role of International Cooperation in Dealing with Climate Change , The IPPC( Intergovernmental Panel on Climate Change) form to access evidence of the human influence on climate change and possible ways to respond Global Impacts of Climate Change , Main fisheries affected , Water conflicts , Sea-level rise , Deforestation , Greater disease risk , Increased severity and frequency of tropical storms , Decreasing crop yields Impacts of Climate Change on Canada , Permafrost is ground that usually remains frozen year-round , Climate change will affect the weather patterns Impacts of climate Changes on British Columbia , Fisheries , Forestry , Wetlands , Water , Wildlife Uncertainty and Decision , Two scenarios to response to climate change - Climate change will not greatly affect our lives or the environment - Climate change will cause drastic changes in weather patterns that will greatly affect our lives and the environment - 36 - An Action Plan for the Global Community Canada’s Response to Climate Change , Reducing greenhouse gas emissions from cars and trucks , Introducing policies requiring major greenhouse gas-producing industries to reduce emissions , Increasing the types of energy-efficient products available , Setting guidelines for improving indoor air quality Section 12.1 Evidence of Continental Drift P. 506 Words to know , Continental drift theory , Earthquakes , Hot spots , Magnetic reversal , Paleoglaciation , Plate tectonic theory , Spreading ridge , Tectonic plate , Volcanoes The Jigsaw Puzzle Fit , When formed, the continents do not match because the plates that the continents are on don’t match perfectly together. Matching Geological Structures and Rocks , Wegner’s theory was supported by the fact that rock structures are similar on present day earth. When formed, the structures form together perfectly. Matching Fossils , Mesosaurus (A small fresh-water fish) fossils were found in South America and the areas in Southern Africa. It is unlikely fact that the fish swam across the Atlantic, so both South America and Africa had to be joined in the past. , Another fossil finding that proved Wegner’s theory was that the cynagnathus and the lystrosaurus (two land animals) were found throughout the Southern Hemisphere. This made the Pangaea Theory appeared to be the best explanation for the fossils to be found so far away from each other. Climate Evidence for Continental Drift , Scientists added their support to Wegner’s Continental Drift theory because of the effects of the ice age. During the ice age, glaciers left behind large valleys, rock formations and deeply scratched rocks. , Scientists believed that if glaciers joined, then most of the landmass would be at the South pole , then the puzzles would fit together. - 37 - , Antarctica contains traces of coal. Since coal is formed the decomposition of living things (usually tropical/ swamp materials), this suggested that Antarctica was warmer that it currently is. How Can Continents Move? , Wagner had a lot of evidence, but it was missing a key question: What makes Continental drift. This Theory took over 30 years before the theory was accepted. A Possible Mechanism , In the years following Wegner’s death (1930), many new findings made scientists reflect on his hypothesis. With these discoveries, scientists supported the once considered far-fetched. During the time of Wegner’s life. , Scientists did not believed that the earth was broken down into slabs of rocks. But in 1920, discoveries made scientists believe in this theory. Some observations that scientists discovered was that underwater volcanoes are openings into the earth’s surface. Volcanoes causes the volcanoes to release gases, melted rocks and chunk of rocks. Earthquakes release emerges that are built-up under the earth’s surface. Both volcanoes and earthquakes causes dramatic events. Evidence from ocean rock and sediment. - When Oceanologists discovered the Mid-Atlantic ridge, they found outthat new rocks were closer to the ridge, silt and organic sediments were farther from the ridge. Evidence from paleomagnetism - Earth has 2 magnetic poles: the north and the south. This is the reason compasses point north. The magnetic field isn’t unchanging though. It is predicted that in a few thousand years, the magnetic field will change and compasses will point the other direction. This theory is known as magnetic reversal. This theory is not understood completely, but scientists believe that the magnetic field is produced by the liquid iron from the planet’s interior. - Compass needles has been frozen in place, like ancient rocks, they have preserved the strength and direction of Earth’s Magnetic field when the rocks were formed. Paleomagnetism is the study of the magnetic properties of ancient rocks. Scientists have also discovered a rock pattern that is now known as magnetic striping. This pattern is repeated both ends of the Mid- Atlantic Ridge. Sea floor spreading: an explanation. - Harry Hess, an American geology professor proposed an explanation that tied together the age of ocean rocks, magnetic striping and sediment thickness. He suggested that magma rises because it is less dense than the materials that surround it. Magma cools and hardens as it breaks through the Earth’s surface, forming new sea floor. This current causes more magma to rise. This continues and pushes old rocks aside. - 38 - - A Canadian geologist released scientific paper that combined the concepts of seafloor spreading and paleomagnetism to explain continental drift. He suggested that when a tectonic plate passes over a hot spot. A geologic hot spot is an area where molten rocks rises to the surface. Wilson thought that continents must break up at certain areas, move across the surface and then rejoin. This hypothesis explaing the formation for mountains and ocean basins. This theory is later known as the plate tectonic theory. 12.2 Features of Plate Tectonics pg. 518 Words to know , Asthenosphere , Epicenter , Lithosphere , Mantle convection , Plate boundary , Ridge push and slab pull , Rift valley , Subduction zone , Volcanic belt Tectonic plates A cross-section of earth Plate motion Push and pull Plate interactions Divergent plate boundaries Convert plate boundaries Oceanic-continental plate convergence Oceanic-oceanic plate convergence Continental-continental plate convergence Transform plate boundaries - 39 - Earthquake Describing earthquake Seismic waves Measuring earthquakes Volcanoes Composite volcanoes Shield volcanoes Rift eruption - 40 -