On the average, sunlight received on the Earth's surface is only ________ as strong as that received at the edge of its atmosphere
A) 1/100
B) 1/10
C) 1/4
D) 1/2
E) 1/8
Answer: D
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Methane, nitrous oxide, and halocarbons
A) are not as potent as carbon dioxide and water vapor. B) exert a negative radiative forcing effect in the atmosphere. C) are all potent greenhouse gases but at present are less of a threat for climate change than carbon dioxide. D) are removed from the atmosphere as fast as they enter and pose no threat of climate change.
If the greenhouse effect did not exist, what would happen to earth?
A) Earth would be too cold to support life as we know it. B) Earth would be much too hot to support life as we know it. C) Earth would be too wet to support life as we know it. D) Our environment would be greatly improved. E) It would make no difference.
The formation of b-hydroxybutyrate from acetoacetate is an example of which of the following type of reaction?
A) decarboxylation B) hydrolysis C) reduction D) oxidation
The dominant type of flora in non-swampy areas of the Late Paleozoic were ____________________
Fill in the blank(s) with correct word