TASK DEFINITION: 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.
PROBLEM: Question: Where is the pressure of gases in the atmosphere at its greatest? Answer: sea level

SOLUTION: The pressure of gases in the atmosphere is greatest at sea level and decreases rapidly as altitude increases.

PROBLEM: Question: What is the term for the length of the route between two points? Answer: distance

SOLUTION: Distance is the length of the route between two points. The SI unit for distance is the meter (m).

PROBLEM: Question: How do heavy alkanes affect the skin? Answer: form a protective layer

SOLUTION:
Lighter alkanes wash away protective skin oils; heavier alkanes form a protective layer.