Human Impact

Which of these is an example of a human activity that causes climate change?

• A. burning fossil fuels

• B. removing greenhouse gases

• C. using alternative energy sources

• D. increasing ash particles from volcanoes

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A greenhouse is a building where plants are cultivated. Because a greenhouse traps some of the incoming solar radiation, the air inside is generally warmer than the air outside. Which gas in Earth’s atmosphere acts like this greenhouse?

• Argon

• Oxygen

• Nitrogen

• Carbon Dioxide

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Which effect is not currently considered to be caused by global climate change?

• A. rising sea levels

• B. reduction in Arctic sea ice

• C. more severe tropical storms

• D. increased precipitation worldwide

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Which activity would reduce human sources of greenhouse gases?

• A. increasing the size of livestock herds

• B. monitoring worldwide volcanic activity

• C. using wind energy to generate electricity

• D. researching ways to add methane to the atmosphere

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Greenhouse gases are increasing in the atmosphere. As these gases increase, which of these processes occurs and allows more heat to be trapped?

• A. Ash particles in the air block sunlight.

• B. Solar radiation is reflected into space.

• C. Increased infrared radiation is absorbed.

• D. Decreased water vapor causes less cooling of the air.

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Humans can cause different types of environmental pollution. When household cleaners are dumped down the drain and make their way into the water supply, which type of pollution has taken place?

• A. air pollution

• B. thermal pollution

• C. chemical pollution

• D. biological pollution

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Which action can humans do to help reduce the rate of global warming?

• A. outlaw alternative energy

• B. increase energy consumption

• C. decrease energy consumption

• D. make computer models of emissions

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What kind of air pollution is shown, and why is this kind of pollution difficult to remedy, or fix?

• A. Human-caused sources of air pollution are difficult to remedy because they exist in every city.

• B. Natural sources of air pollution are difficult to remedy because we can’t control when they will happen.

• C. Natural sources of air pollution are difficult to remedy because they are secondary sources of air pollution.

• D. Natural sources of air pollution are relatively simple to remedy because they do not change the surrounding environment.

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The graph shows the change in average global temperature during the last 100 years. The graph shows both natural and human contributions to climate change. Which of these statements is supported by the graph?

• A. Human activities have caused most of the change in Earth’s increased temperatures.

• B. Earth’s surface is becoming warmer mostly because of an increase in the sun’s energy.

• C. Natural factors have been the main factor in causing Earth’s climate to become warmer.

• D. Driving vehicles every day in crowded cities is the main contributor to increasing temperatures.

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Wetlands are usually found along larger bodies of water. Living things in wetlands have been found to remove pollution there. Scientists argue that as human activities decrease the size of wetlands, the levels of pollution in the area increase. Which question would give an answer that provides evidence to support this argument?

• A. How does the loss of habitat affect the animals that live there?

• B. How do we decrease the amount of pollutants in the wetlands?

• C. What role do plants and animals have in the wetlands?

• D. What function does water near the wetlands have in the environment?

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