As the kinetic energy of the molecules in a substance increases, the

a. temperature of the substance increases.

b. temperature of the substance decreases.

c. potential energy of the substance changes.

d. temperature remains the same.

a. temperature of the substance increases.

Explanation:

Temperature is defined as a measure of the average kinetic energy of a substance, so as one rises, so will the other. They are directly proportional.

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

the answer is b, have negligible mass