Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[EX Q]: Question: What is the term for the gases that surround a planet? Answer: the atmosphere
[EX A]: An atmosphere is the gases that surround a planet. The early Earth had no atmosphere. Conditions were so hot that gases were not stable.

[EX Q]: Question: When the volume of a gas is decreased, what happens to its pressure? Answer: increases
[EX A]: When the volume of a gas is decreased, its pressure is increased.

[EX Q]: Question: About how many grams of carbohydrates are in a typical apple? Answer: 20
[EX A]:
An apple contains about 20 grams of carbohydrates. How much energy does it provide?.