Unit 5: Human Impact on our Planet

Tropical rain forests remove carbon dioxide gas from Earth's atmosphere. Deforestation could affect Earth's overall average temperature because...

• More of Earth's reflected infrared radiation would be absorbed by the atmosphere

• More sunlight would be reflected back to space by Earth's atmosphere

• More visible light would be absorbed by Earth's atmosphere

• More ultraviolet light would be transmitted through Earth's atmosphere

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NGSS.HS-ESS2-2

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NGSS.HS-ESS3-5

This change in carbon dioxide (CO₂) concentration most likely caused...

• A decrease in sunlight transmitted through our atmosphere

• A decrease in the thickness of Earth's atmosphere

• An increase in the absorption of infrared radiation by Earth's atmosphere

• An increase in the thickness of Earth's glaciers

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112.28.b.11.B

The most likely cause of the overall change in the level of carbon dioxide from 1960 to 1990 is an increase in the...

• Number of violent storms

• Number of volcanic eruptions

• Use of nuclear power

• Use of fossil fuels

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NGSS.MS-ESS3-4

Farmers can best reduce negative effects on the water quality of nearby streams and lakes by planting crops that

• Produce less oxygen

• Produce less carbon dioxide

• Need less fertilizer

• Need less solar energy

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112.27.b.11.A

The model shows an area near a lake. Community leaders are planning new laws to help protect the lake from pollution. One proposed law will make it illegal to dump trash on the shore of the lake, but the law still allows trash to be placed in the area labeled "Flow-through wetland."

Which statement about the proposed law is supported by the model?

• The proposed law will protect the lake because plant roots between the wetland and the lake will stop pollution from entering the lake.

• The proposed law will not protect the lake because animals that live in or near the lake will add pollution to the lake.

• The proposed law will not protect the lake because groundwater will carry pollution from the wetland directly into the lake.

• The proposed law will protect the lake because the high evelation of the water table will block pollution from entering the lake.

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112.27.b.11.A

Ocean water absorbs carbon dioxide from the atmosphere. Carbon dioxide lowers the pH of the ocean water, which is harmful to organisms living in the ocean.

Which activity is most likely to decrease the amount of carbon dioxide being added to the ocean water?

• Cutting down rainforests to use the land to farm crops

• Constructing homes on farmland rather than on vacant lots in the cities

• Going to school in cars instead of riding the bus with other students

• Using electrically powered devices instead of those powered by fossil fuels

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112.27.b.11.B

Humans depend upon food that comes from the ocean. Some human activities negatively impact these food supplies.

Which statement provides the best evidence that human activities contribute to this impact?

• Human visitors to coral reef systems break corals growing on rocks

• Humans catch marine fish at a faster rate than the fish are able to reproduce.

• Humans raise fish in a atchery for commercial sale.

• Humans construct artificial reefs to attract tourists.

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112.27.b.11.B