The surface of the lava has cooled enough so some residents are pushing bicycles across it to avoid the long drive.

The hot surface has cooled down and the cold surface has heated up.

Finally, the surface cooled further and the rain no longer steamed off.

At night, the surface cools down and contracts.

The faster the wind speed, the more readily the surface cools.

When the surface cools, carbon dioxide increases and the surface warms.

As a substance evaporates, the surface cools because the escaping particles carry kinetic energy.

Since the surface cools quicker, there is more free volume at the surface than in the bulk melt.

The sun sinks, and the great barren surface cools.

The ocean's surface cools and warms cyclically in response to the strength of the trade winds.