Why do molecules change the speed? (SELECT ONE)  Claim 1: Molecules speed up when energy is created and slow down when energy is destroyed.
 Claim 2: Molecules speed up when they get energy from other molecules and slow down when they give energy to other molecules.

With an increase in temperature, the particles gain kinetic energy and move faster. The actual average speed of the particles depends on their mass as well as the temperature – heavier particles move more slowly than lighter ones at the same temperature.

3 hours because it is a decent distance.