What happens when humans burn fossil fuels? A. Carbon is released into the atmosphere.

B. Carbon is removed from the atmosphere.

C. Carbon is added to the the carbon cycle.

D. Carbon is destroyed.

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Which of the following statements is a scientific claim? a. the early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water. b. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea. c. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. d. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated.