Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Q: Fact: Matter in the gas phase has variable shape

A: A solid has a fixed shape. When liquid is boiled and turns into gas, its shape is?
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Q: Fact: a star is a source of light energy through nuclear reactions

A: A star produces light energy and heat because it has a variety of?
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Q: Fact: the Earth revolving around the sun causes stars to appear in different areas in the sky at different times of year

A:
If a person looks at the night sky in February and then again in June, the stars will be?
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