In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Q: Question: Hot magma beneath the surface mixes with water and forms what? Answer: gas

A: Hot magma beneath the surface mixes with water and forms gas.
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Q: Question: What do you call a group of organisms of the same species that live in the same area? Answer: population

A: You call a group of organisms of the same species that live in the same area a(n) population.
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Q: Question: When magma reaches the surface through cracks in the earth's crust, what occurs? Answer: volcanic eruption

A:
When magma reaches the surface through cracks in the earth's crust, a volcanic eruption occurs.
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