Most balloons pop themselves when the gas expands too much.

Under equal pressures, all gases expand at the same rate.

For example, gas flung out by the explosion has been expanding at the rate of 1,300 kilometers per second ever since.

As a gas expands, the average distance between molecules grows.

If a gas expands in volume (at fixed temperature) then its pressure falls.

As the temperature rises, the gas expands, driving the pressure upward.

Nina shows how gases expand or get bigger when they warm up.

All gases expand at the same rate under the same conditions.

A gas in the cold space would expand by a factor of four when moved to the hot space.

Since the land's surface is warm, the gases expand and an area of low pressure develops.