What is the primary mechanism by which plants protect climate?
A) They take oxygen out of the air for respiration.
B) They take carbon dioxide out of the air during photosynthesis.
C) They emit water vapor into the air during transpiration.
D) They lower the air temperature by absorbing heat.
B
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Assuming a frictionless ice surface, a hockey puck will continue moving at a constant speed in the same direction until it strikes something. Which of the following does this scenario represent?
A. Newton's first law of motion B. Newton's second law of motion C. Newton's third law of motion D. centripetal force
Jean stands on slippery ice and catches her leaping dog Daisy. After the catch, the momentum of both
A. increases. B. decreases. C. does not change. D. none of the above
How much of the region experiences average annual rainfall of less than 250 millimeters (10 inches)?
A) 75%
B) 80%
C) 60%
D) 55%
E) 85%
Most glaciers are stationary, moving at no more than several millimeters per year
Indicate whether the statement is true or false