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.

[Q]: Question: What is the distance north or south of the equator called? Answer: latitude
[A]: Latitude is the distance north or south of the Equator. It is expressed as a number between 0 and 90 north or south.

[Q]: Question: What occurs when there is a sudden discharge of static electricity between a cloud and the ground? Answer: lightning
[A]: Lightning occurs when there is a sudden discharge of static electricity between a cloud and the ground.

[Q]: Question: Sound is the transfer of energy from a vibrating object in waves that travel through what? Answer: matter
[A]:
Sound is the transfer of energy from a vibrating object in waves that travel through matter.