GEOLOGY

Detailed explanation-1: -As air warms near the surface of the Earth, or on the first floor of a home, the air molecules move around faster, creating more space between those molecules making the air less dense than the cooler air above it. The warm, less dense air rises while the cooler, more dense air sinks down.

Detailed explanation-2: -Cold air sinks. Sinking air compresses and heats. As air sinks, air pressure at the surface is raised. Cold air holds less moisture than warm.

Detailed explanation-3: -Answer and Explanation: Cold air sinks because it is denser than warm air. For example, cold air coming down from mountains can create valley fog.

Detailed explanation-4: -As the denser air reaches the earth’s surface it spreads and undercuts the less dense air which, in turn, forces the less dense air into motion causing it to rise.

Detailed explanation-5: -At the poles, the air is colder and more dense so the air sinks. This cold, sinking air creates areas of high pressure. Pressure differences in the atmosphere cause the air to move. Winds generally move from the poles to the equator because air moves from areas of high pressure to areas of low pressure.