What are the so-called greenhouse gases that trap heat?
a) carbon dioxide, methane, nitrous oxide, ozone, chlorofluorocarbons
b) oxygen, water vapor, black carbon, carbon dioxide
c) hydrogen, nitrogen, sulfur dioxide, oxygen
d) carbon dioxide, methane, oxygen, ozone
e) ozone, smog, nitrous oxide, aerosols
Question 2
Why are spring tides highest when the Moon is near perigee?
a) The Moon is moving fastest in its orbit at that time
b) The Moon is farther from Earth, so gravitational force is greater
c) The difference between solar and lunar tides is maximum at this time
d) The Moon and Sun are lined up
e) The Moon is closer to the Earth, so gravitational force is greater
Bay (left) and chestnut (sometimes called "sorrel") are two of the most common coat colors
Renal calculi (stones) can form in several areas within the urinary tract. When they form in the kid
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Geometry of bonds when carbon is covalently linked to three or four other atoms
Exchange of Oxygen and Carbon Dioxide
Estimates of carbon stored in the plants and soils of different ecosystems.