In the greenhouse effect, what is the direct cause of extra heating of the Earth's surface?
A) Additional carbon dioxide makes the atmosphere more transparent to infrared light, allowing the sun to more directly heat the surface.
B) Additional carbon dioxide makes the atmosphere more opaque to infrared light, trapping more of the infrared light emitted by Earth.
C) Additional carbon dioxide makes the atmosphere more dense, so heat passes through it more slowly.
D) Additional carbon dioxide makes the atmosphere emit more infrared light which gets trapped near the surface of the Earth.
B) Additional carbon dioxide makes the atmosphere more opaque to infrared light, trapping more of the infrared light emitted by Earth.
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What will be an ideal response?
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Indicate whether the statement is true or false
You are at the leading end of a canoe and your friend is at the trailing end while the canoe is drifting along at a speed v. You toss a backpack to your friend. While the backpack is in flight, what is the canoe's speed? Ignore any friction effects between the canoe and the water
1.It is greater than v. 2.It is less than v. 3.It maintains the same speed it had before the backpack was thrown. 4.We cannot tell from the information given.