Given a scientific passage and an answer, generate a question for the given answer.

Q: Passage: You can tell that this sponge is saturated with water because when it is squeezed, the water pours out. When something is saturated with water, it already holds as much water as possible. Compounds called hydrocarbons, which contain only carbon and hydrogen, can also be saturated, but not with water. Answer: hydrocarbons

A: What compounds contain only carbon and hydrogen?
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Q: Passage: Ocean water also absorbs gases from the atmosphere. The most important are oxygen and carbon dioxide. Oxygen is needed by living things in the oceans. Much of the carbon dioxide sinks to the bottom of the seas. Carbon dioxide is a major cause of global warming. By absorbing carbon dioxide, the oceans help control global warming. At least as long as the carbon dioxide stays in the seas. Answer: carbon dioxide

A: Oceans help control global warming by absorbing what?
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Q: Passage: Climate is the temperature plus precipitation of an area. Not just today, but over a long period of time. Climate affects chemical weathering. Chemical weathering increases as:. Answer: climate

A:
What is defined as the temperature plus precipitation of an area over a long period of time?
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