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: When sand is deposited along a shoreline, what is created? Answer: beach
[EX A]: Sand deposited along a shoreline creates a beach.

[EX Q]: Question: What are the highest clouds in the atmosphere? Answer: noctilucent clouds
[EX A]: Noctilucent clouds are the highest clouds in the atmosphere.

[EX Q]: Question: Van der waals forces are weak interactions between molecules that involve what? Answer: dipoles
[EX A]:
Van der Waals forces are weak interactions between molecules that involve dipoles.