air pressure

Air pressure from the outside has little effect on the water.

On a mountain top the air pressure is a little lower.

The room behind it seemed to have a low air pressure.

A change of air pressure told them that a great door had opened.

Down here at the bottom it is higher than the air pressure.

Not only that, but they would have to do something about the loss of air pressure within the station.

One group read temperature first and the other air pressure.

They also keep air pressure in the ears at the right level.

For the most part, these changes in air pressure are extremely small.

There was a sudden change in air pressure around her.