Exam 2: Science, Matter, Energy, and Systems

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The ____________________ cycle is disrupted by human activities such as sewage waste,deforestation,burning of fuels,and agricultural fertilizers.

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The Earth's crust and upper mantle are called the

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Denitification processes convert nitrogen gas in the atmosphere into ammonia.

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  -On the generalized structure of the earth figure,choose the letter of the layer that is made up of the troposphere and the stratosphere. -On the generalized structure of the earth figure,choose the letter of the layer that is made up of the troposphere and the stratosphere.

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More humans can be supported on Earth if we all ate lower on the food chain.

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The variation in a population is called ____________________.

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Ammonia in soil may undergo nitrification by specialized bacteria to nitrites then nitrates.

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The matter and energy laws tell us that we can recycle

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A cockroach is an example of an omnivore because it feeds on both plants and animals.

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Atoms,ions,and molecules are the building blocks of ____________________.

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All of the following are consumers except

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Electrical discharges and nitrogen-fixing bacteria convert atmospheric nitrogen into nutrients that multicellular organisms can use.

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A set of organisms that are similar in genetic make up and reproduce sexually to produce fertile offspring are members of the same species.

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The hydrologic cycle is driven by all of the following except

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Bacteria are more important in the ____________________ than in the carbon or phosphorus cycle.

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Anything that has mass and takes up space,and can exist as solid,liquid and/or gas is called ____________________.

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In food chains,energy moves from one source to the next,resulting in a loss of useful energy to the environment as heat.The amount of chemical energy transferred between trophic levels is usually

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  -On the food chain figure,choose the level that is the source of all food in an ecosystem. -On the food chain figure,choose the level that is the source of all food in an ecosystem.

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The portion of the atmosphere containing the air we breathe is called the

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Net primary productivity is the rate

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