Chapter 6 Test

Which of the following do paleoclimatologists use to investigate the climate of the past?

• fossil records
• ice-core samples
• coral
• all of the above

If you want rainfall data for the past 100 years but do not have access to human records, which of the following climate proxies would be most helpful to your investigation?

• coral
• tree rings
• fossils found in bedrock
• ice cores

You’d like to find out what Earth’s climate was like tens of millions of years ago. Which of the following climate proxies would be most helpful to your investigation?

• coral
• tree rings
• fossils found in bedrock
• ice cores

Milankovitch cycles reflect periodic change in three properties of Earth’s orbit. What are these three properties?

• eccentricity, axial tilt, and precession
• distance from Sun, distance from Moon, and eccentricity
• recession, secession, and precession
• sunspots, atmospheric CO2, and axial tilt

If the angle of tilt of Earth’s axis was 10° greater than its actual present value, people at mid-latitudes would most likely experience

• hotter summers and warmer winters
• hotter summers and colder winters
• cooler summers and warmer winters
• cooler summers and colder winters

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How did India’s collision with Asia lead to decreased atmospheric CO2 levels?

• As the Himalaya Mountains grew, they used CO2 to form new rock.
• More rock was exposed to weathering, which reacted with CO2 dissolved in rainwater to form calcium carbonate.

• As the tectonic plates collided, a carbon vacuum was created and needed to be filled with CO2.
• Carbon-rich rocks were subducted and could not interact with the atmosphere.

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Which of the following is NOT a key factor that affects the surface temperature of Earth?

• The amount of oxygen gas in the atmosphere.
• The amount of light energy that Earth receives from the Sun.
• The amount of light energy that is reflected back into space by Earth’s atmosphere and surface.
• The amount of reradiated heat energy that is trapped by greenhouse gases in the atmosphere.

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If you wanted to determine what Earth’s surface temperature was 100 years ago, the most accurate data would come from ____.

• Ocean sediments
• Tree rings
• Ice cores
• Thermometers

If you wanted to determine what Earth’s surface temperature was millions of years ago, the most accurate data would come from ____.

• Ocean sediments
• Tree rings
• Ice cores
• Thermometers

Ancient glacial deposits found in a location with a temperate climate indicate that in the past, the climate in this location ____.

• Had more precipitation.
• Had less precipitation.
• Was warmer.
• Was colder.

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