Chapter 4: Evolution, Species Interactions, and Biological Comm

Where can water be found on Earth? Select all that apply.

• air

• oceans

• soil

• rocks

• trees

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How do human activities negatively affect the water cycle and the environment? Select all that apply.

• Pollutants can run off surfaces into streams.

• Pollutants can move through soil into ground water.

• Air pollution can come back to Earth in the form of acid rain.

• Water is stored in lakes and reservoirs.

• Water evaporates into the atmosphere.

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Where can carbon be found on Earth? Select all that apply.

• air

• plants and animals

• soil

• fossil fuels

• oceans

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How do human activities negatively affect the carbon cycle and the environment? Select all that apply.

• Excess carbon is released into the atmosphere by burning fossil fuels.

• Excess carbon is released into the atmosphere through farming.

• Excess carbon is released into the atmosphere by using solar and wind energy.

• Excess carbon is released into the atmosphere by carbon sinks.

• Excess carbon is released into the atmosphere by sunlight.

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Where can nitrogen be found on Earth? Select all that apply.

• air

• soil

• plants and animals

• metals

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What is (are) the function(s) of nitrogen to living organisms?

• It is in carbohydrates.

• It is in fats and oils.

• It is in proteins.

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How do human activities negatively affect the nitrogen cycle and the environment?

• Farm fertilizer adds nitrogen to waterways.

• Plants use too much nitrogen.

• Humans eat too much nitrogen.

• Bacteria grow too fast in the soil.

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Where can phosphorus be found on Earth?

• rocks

• soil

• air

• water

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How do human activities negatively affect the phosphorus cycle and the environment?

• Phosphorus in fertilizer enters waterways trough runoff.

• Phosphorus enters the air through burning fossil fuels.

• Phosphorus enters waterways though burning fossil fuels

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How does sulfur enter the atmosphere and streams?

• volcanos

• burning fossil fuels

• bacteria

• plants

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