Climate Change

Geologic and current data provides evidence that Earth's temperature

• have always fluctuated but is trending downward

• have always fluctuated but is trending upward

• have remained the same and then increased during the Industrial Revolution

• have remained the same for the last 400,000 years

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The greenhouse effect

• makes life on Earth possible because Earth would be too cold without it

• needs to be eliminated for survival

• did not exist until fossil fuels were burned

• makes life on Earth possible because Earth would be too hot without it

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As a consequence of climate change, coastal areas could

• be flooded as ocean levels rises

• experience an increase in winter ice sheets

• become further inland as ocean levels recede (go down)

• get cooler due to more water entering the water cycle

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Ice samples from glaciers provide evidence that today's atmosphere contains more carbon dioxide than ancient atmospheres did. This increase concerns scientists because

• increased carbon dioxide may cause plants to grow rapidly

• this may cause a loss in the amount of energy reaching the Earth from the Sun

• this may contribute to a gradual warming of the atmosphere

• this may contribute to a rapid cooling of the oceans

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Deforestation increases the greenhouse effect on Earth because deforestation causes the atmosphere to contain

• more carbon dioxide

• less carbon dioxide

• less oxygen

• less water vapor

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Which component of Earth's atmosphere is classified as a greenhouse gas?

• oxygen

• nitrogen

• helium

• carbon dioxide

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Certain gases in Earth's atmosphere are called greenhouse gases. How did they get this nickname? Pick the best answer

• They are found in varying amounts in the Earth's atmosphere

• They allow heat to be trapped in Earth's atmosphere

• They reflect heat back to the sun, away from Earth's atmosphere

• They are necessary to grow plants in a greenhouse

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What human activity can have the GREATEST positive change on global climate change by helping to reduce the amount of carbon dioxide in the atmosphere?

• building homes out of metal instead of wood

• recycling plastics

• limiting engines that use fossil fuels for energy

• using alternatives to choloroflurocarbons (CFCs) for refrigeration

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How do scientists collect evidence about climate changes?

• using remote sensing from space with satellites

• using ground-based measurements of temperatures and carbon dioxide, and sea levels

• by collecting information from tree rings, ice cores, and historical records

• all of the above

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The pie chart shows sources of carbon emissions in the US. Look at the two highest sources of carbon emissions. What do these two sources best have in common?

• They generally rely on the burning of fossil fuels

• They cause deforestation

• They reduce reliance on fossil fuel use

• They are good examples of renewable energy use

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