Question: Given the fact that:  The density of the atmosphere decreases with an increase in the height above sea level (altitude).  Answer the question:   What would happen to the atmosphere as Jim climbed lower down a mountain it would become less dense or it would become more dense?
Answer: it would become more dense

Question: Given the fact that:  The particles in matter are always moving. The more energy they have, the faster they move.  Answer the question:   When a child has a lot of energy they will move around slower or faster?
Answer: faster

Question: Given the fact that:  The more energy the particles in matter have, the faster and more strongly they vibrate.  Answer the question:   Don wants to make sure that his particles will move slower, so he will make sure the energy they have is more or less?
Answer:
less