Question

question 7 warm air... a is less dense than cool air. b has molecules that are moving slower than in cool air. c will show a 500mb level that is lower than that of cooler air. question 8 pressure changes...(select all that apply) a more due to migrating weather systems. b more at the poles daily than at the equator. c due to the heat from the sun. d occur twice daily.

Explanation:

For Question 7: When air is heated, its molecules move faster and spread out, making warm air less dense than cool air. Molecules in warm air move faster, and the 500mb level is higher in warm air.
For Question 8: Pressure changes can be due to migrating weather - systems like high - and low - pressure systems. The poles experience more daily pressure variation than the equator because of the different temperature gradients. The Sun's heat also affects air temperature and thus pressure. There is no fixed rule that pressure changes occur twice daily.

Answer:

Question 7: A. is less dense than cool air.
Question 8: A. more due to migrating weather systems., B. more at the poles daily than at the equator., C. due to the heat from the Sun.