Which of the following statements about the effect of human-induced increase in the amount of carbon dioxide on the oceans is false?
answer
Nearly half of the human-generated CO2 ends up in the oceans.
When carbon dioxide is absorbed in the ocean it reduces the pH of seawater.
The shift toward acidity in the ocean makes it more difficult for certain marine organisms to build hard parts out of calcium carbonate.
The shift toward acidity in the ocean impacts microbes and corals.
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Astronomical causes of climate change occur with cycles of:
answer
26,000 to 100,000 years.
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What statement about the year without summer is correct?
answer
The year without summer followed the eruption of Mount Tambora in Indonesia.
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Which of the following is a true statement about the impact on weather and climate of the eruption of Mt. St. Helens?
answer
The cooling was so slight that it could not be distinguished from other natural temperature fluctuations.
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When did the supercontinent Pangaea exist?
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250 million years ago
question
The precession aspect of the astronomical theory refers to:
answer
changes in the wobbling of the Earth as it spins on its axis.
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Which of the following is not a likely result of the increase in area affect by drought associated with global warming?
answer
Increase in Soil Erosion
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Which of the following is not a likely consequence of global warming?
answer
Loss of sea ice in the Arctic Basin.
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The most prominent way by which humans are increasing atmospheric carbon dioxide is through:
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burning of coal, natural gas, and petroleum.
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The person who first developed and strongly advocated the astronomical theory was:
answer
Milutin Milankovitch.
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The portion of the Earth's surface where water is in a solid form is called
answer
the cryosphere.
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Which of the following statements about excess CO2 in our atmosphere is false?
answer
As a result of human activities, the present CO2 level is about twice the highest level over the past 600,000 years.
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What is the current axial tilt of the Earth?
answer
23.5 degrees
question
Sunspots
answer
are magnetic storms.
extend from the Sun's surface deep into the interior.
are associated with the ejection of huge masses of particles.
occur in cycles.
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Which of the following is not a likely change due to 21st Century climate trends?
answer
Decrease in tropical storm activity.
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Dark areas on the surface of the Sun are called:
answer
spots
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Which of the following is NOT a greenhouse gas?
answer
argon
question
The theory of plate tectonics suggests:
answer
that there was one single "supercontinent" on Earth about 300 million years ago.
changes in ocean circulation must have occurred over great spans of geologic time.
that the supercontinent (Pangea) was located near the South Pole.
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Scientific research suggests that sea level has _____ since 1870.
answer
risen about 25 centimeters
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The large plates that make up the outer portion of the Earth move approximately a few ____ per year.
answer
centimeters
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Which of the following factors is responsible for generating the current high level of interest in climate change?
answer
The realization that climate is more likely to differ from the present than to stay the same.
The realization that humans are inadvertently changing the climate of Earth.
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Reliable information on past climates attained from weather instruments such as thermometers and rain gauges extends back:
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a couple of centuries at best.
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In a study that compared the hypothesis that climate change is related to variations in the Earth's orbit and the results of deep-sea sediments suggested:
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that major variations in climate over the past several hundred thousand years were closely associated with changes in the geometry of Earth's orbit.
that predictions based on the hypothesis that past climate change is due to variations in the Earth's orbit applies only to natural component of climate change.
that predictions based on the hypothesis that past climate change is due to variations in the Earth's orbit capture only long-term trends.
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The Earth's climate can be broadly characterized as being a warm "greenhouse" or a cold "icehouse". Which of the following statements regarding this characterization is false"?
answer
The last transition from greenhouse to icehouse climates occurred in the Mesozoic era.
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Which of the following is NOT an important source of methane in the atmosphere?
answer
combustion
question
A reduction in sea ice would:
answer
would act as a positive feedback mechanism on global warming.
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