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Chapter 5 Name Date Class bk What is hypothesized about extinction A All extinctions have been mass extinctions. B Background extinctions are a normal part of stable ecosystems. C The current extinction rate is estimated to be twice the normal rate. D In the future, less extinction will occur near the equator than elsewhere. bl A fenced, grass-covered bridge has been built over a highway that allows animals in one area to move safely to the other area. What method of wildlife conservation is being used A ecosystem bridge B environmental pathway C habitat corridor D environmental passageway bm A town had several homeowners that would mow their grass during the summer, collect the clippings, and dispose of them in a landfill. The town would like to start a more ecologicallysound method of grass clippings disposal. Which suggestion makes the most ecological sense A Leave clippings to decompose in the lawn and enrich the lawn. B Spray clippings in the lawn with imported microbes that feed on grass. C Burn the clippings and add the ashes to the soil. D Throw the clippings into the local river as food for organisms that live there. bn Waste-to-Energy (WTE) is a program that sorts and burns organic waste material, including garbage, to obtain energy. What might be anticipated as an additional bonus in communities utilizing WTE A increased numbers of parks B increased air pollution C increased recycling of garbage D decreased amount of auto emissions bo Which human activity has probably contributed most to the acidification of lakes in forests A passing environmental protection laws B establishing reforestation projects in lumber areas C burning fossil fuels that produce air pollution D using pesticides for the control of insects that feed on trees bp The variety of colors within a species, the ability for members of a species to recover from disease, or the ability of a species to find new food sources are all examples of . A background extinction B species diversity C sustainable use D genetic diversity Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 10 CHAPTER 5 STANDARDIZED TEST PRACTICE
Chapter 6 Name Date Class 1 Which does a polymer most closely resemble A circle B link in a chain C chain D intersection 2 Different organisms store glucose in various forms. You discover a new species. Upon chemical analysis, you find that it is comprised of significant amounts of glycogen. To which organism might this new species be related A fern B potato C dog D bacteria 3 Which is NOT true of lipids A They are commonly called fats and oils. B They are hydrophobic. C They are good for energy storage. D They are polar. 6 Which is true about enzymes A They act on nonspecific, randomly chosen substrates. B After a reaction, they cannot be reused. C They can speed up metabolic processes in the body. D They cannot change shape. 7 What type of compound is made up of atoms held together by covalent bonds A ion B molecule C isotope D element 8 What makes a water molecule polar Hydrogen atoms Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 4 Which cannot take place during a chemical reaction A formation of new atoms B bonds breaking between atoms C formation of new molecules D bonds forming between atoms 5 A student drew and labeled the graph below based on the results of an experiment. Why did the student include the labels activation energy and energy released Activation energy Chemical Reaction Diagram (Methane + O 2 ) (CO 2 + H 2 O) Energy released A to explain why carbon dioxide and water react to form methane and oxygen B to show that the reaction needed heat to occur C to explain why the experiment gave off heat D to explain why methane and oxygen react to form carbon dioxide and water Oxygen atom A Water has the ability to be frozen. B The pH of pure water varies with the temperature. C A water molecule has a slight charge on each end. D A water molecule is made up of three atoms. STANDARDIZED TEST PRACTICE CHAPTER 6 11
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