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: What is the strength of an earthquake called? Answer: magnitude
[EX A]: Earthquake: What Does Magnitude Mean? at http://www. livescience. com/20538-earthquake-magnitude-video. html (2:00).

[EX Q]: Question: What can be calculated given the mass and speed of an object? Answer: kinetic energy
[EX A]: Given the mass and speed of an object, calculate its kinetic energy.

[EX Q]: Question: What is the unit of liquid measurement in the metric system? Answer: liter
[EX A]:
Transition metal ions often involve rearrangements of both d and s electrons.