CCS Earth Science U2 Post

When a large meteor strikes Earth, environmental changes may result as dust particles scatter throughout the atmosphere. Which best describes how an increase in atmospheric particles would affect temperatures on the surface of Earth?

• Temperatures would increase because the particles would increase the greenhouse effect.

• Temperatures would increase because particles would trap the heat radiating from Earth at night.

• Temperatures would decrease because the particles would provide more substance for snow formation.

• Temperatures would decrease because the particles would absorb solar radiation before it could reach the surface of Earth.

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An increase in carbon dioxide in the atmosphere is associated with an increase in global temperature. Which property of carbon dioxide is responsible for this temperature increase?

• Carbon dioxide transmits more sunlight than other atmospheric gases.

• Carbon dioxide efficiently turns sunlight into heat.

• Carbon dioxide keeps heat in the atmosphere from escaping into space.

• Carbon dioxide stores solar energy in chemical bonds.

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Based on the data, what can be predicted about the likely effect of greenhouse gases on Earth’s future climate?

• The temperature of Earth will not change, and the climate will remain the same.

• The temperature of Earth will vary, and the climate will remain the same.

• The temperature of Earth will likely increase, and the climate will be warmer than the present.

• The temperature of Earth will likely decrease, and the climate will be cooler than the present.

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Ice molecules take up more volume than liquid water molecules. Which of these conditions occurs when water in a pond freezes?

• Water molecules solidify at the bottom and push the liquid water upward.

• Water molecules solidify near the surface and float on the liquid water.

• Water molecules break apart into solid oxygen and solid hydrogen.

• Water molecules form solids when they combine with dissolved minerals.

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How does the Gulf Stream affect weather in Florida?

• The Gulf Stream helps weather to be cooler in the fall.

• The Gulf Stream helps weather to be cold during the winter.

• The Gulf Stream causes weather to be rainy during the spring.

• The Gulf Stream causes weather to be dry during the summer.

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Hurricanes are driven by the energy they get from ocean water. Which property of water allows it to retain the energy needed to power a hurricane?

• low vapor pressure

• high specific heat

• high surface tension

• low freezing point

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If the release of carbon dioxide emissions from human activities decreases the amount of carbon dioxide in the atmosphere by 20 ppm, what will be the likely effect on global temperature? Global temperature will (decrease/increase) by (20/0.20) °F.

• decrease

• increase

• 20

• 0.20

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The average temperature of Earth has increased approximately 0.9°C in the last one hundred years. Which of the following do researchers most attribute to this temperature increase?

• increased population in third-world countries

• increased use of fossil fuels

• the solar flares reaching Earth

• the lower amounts of carbon dioxide

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Which will most likely occur as a result of this phenomenon to cause environmental changes?

• melting of the polar ice caps

• varied atmospheric conditions

• an increase in volcanic eruptions

• an increase in the length of summers

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Which difference between water and ice results in ice floating on cold water?

• heat

• shape

• density

• volume