In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.

[EX Q]: Question: objects made of what cause refraction of light? Answer: melted sand.
[EX A]: objects made of glass cause refraction of light

[EX Q]: Question: If a person is making laps around a gym, they find that? Answer: their heart starts racing.
[EX A]: as energy required for an activity increases , pulse will increase

[EX Q]: Question: With the addition of thrusters your forward momentum will? Answer: increase.
[EX A]:
a force continually acting on an object in the same direction that the object is moving can cause that object 's speed to increase in a forward motion