Warm air rises, and it would be warmer halfway up the ridge than at the bottom.

Since warm air rises, basements are typically cooler than the rest of the house.

You don't need to be a rocket scientist to know that hot air rises.

Because heated air rises, the system includes fans to force down the hot air to lower levels.

They feed on heat that is released when moist air rises.

This mercifully let hot air rise beyond the guests in the days before air-conditioning.

As summer temperatures heat up the central valley, the warm air rises.

He knew that hot air rises, and on the top floor it should have been well above ninety.

As air rises, it condenses to form layers of cloud.

The warmed air rises and is pulled into the column of clouds.