Question #e0b7a

1 Answer
Oct 10, 2017

air moves from areas of a cold air mass to areas with a hot air mass.

Explanation:

The molecules in a cold air mass are more dense than in a warm air mass. molecules in a cold air mass are closer together and more dense than the molecules in a a warm or hot air mass. molecules will always move according to the laws of thermodynamics from an area of greater density to an area of less density. So a wind will blow form a cold area to a warm area.

A sea breeze usually occurs during the day. The air over the water is cooled by the colder water. The air over the land is warmer so the wind blows toward the land.

A land breeze usually occurs during the night. When the sun sets the land cools down and become colder than then air over the ocean causing the wind to blow toward the ocean.

Mark Twain remarked that the coldest winter he ever experienced was San Francisco in August. The vast central valley of California heats up during the summer. The hot air rises causing the cold air from the ocean to rush across San Francisco to replace the the rising hot air. This movement of air from a cold air mass to a warm air mass air conditions San Francisco to the point of being uncomfortably cold in late summer.