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 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: What is the term for the length of the route between two points? Answer: distance
[A]: Distance is the length of the route between two points. The SI unit for distance is the meter (m).

[Q]: Question: What class are centipedes and millipedes in? Answer: myriapoda
[A]:
Myriapoda, which includes centipedes and millipedes. All of these animals live on land, and can have anywhere from ten to nearly 200 pairs of appendages.