Lesson 6.1 Natural Events & Climate

What is global warming?

• Increasing temperature in Earth's atmosphere

• Decreasing temperature in a city

• Increasing rain rates in Earth

• Decreasing temperature rates

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True or False: Global warming is caused by a phenomenon known as the greenhouse effect.

• 
• 

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Without the Greenhouse Effect the Earth would be too . . .

• warm 
• cold
• dead
• funny

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Worldwide, temperatures have been increasing for more than 100 years.  Is this evidence of global warming?

• yes
• no

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How can Global Warming cause sea levels to rise?

• by causing it to rain more often.

• by creating bigger and more powerful hurricanes.

• by melting glaciers and ice caps.

• by increasing the number of undersea volcanic eruptions.

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Why does cutting down trees increase global warming?

• Trees absorb the Sun’s energy without radiating back into the atmosphere.

• Trees drain Greenhouse gases like methane from soil.

• Trees provide shade which counteracts Global Warming.

• Trees soak up Carbon dioxide.

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The greenhouse gas having the greatest role in human-caused global warming is

• methane
• carbon dioxide
• CFCs (chlorofluorocarbons)
• ozone

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True or False: We need the natural greenhouse effect for Earth to be habitable.

• True
• False

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How is the greenhouse effect produced?

• They absorb and trap heat from the sun, warming the Earth's surface.

• The Earth reflects sunlight back into space, preventing the atmosphere from warming.

• Trees and plants release carbon dioxide, which cools the Earth.

• The sun releases heat that directly heats the Earth's oceans, causing the atmosphere to warm.

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Which of the following is NOT an effect of Global Warming?

• Polar ice caps will melt.
• Coastal regions will be covered with rising sea levels.
• Some areas will experience serious droughts
• The Earth's rotation will slow down and eventually stop

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