How much of the earth's surface is covered with water? Three quarters (or around 75%) of Earth's surface is covered with water.

Of what are clouds made? Water vapor, or water that has evaporated in to the air.

Which kind of cloud... Is large and puffy? Cumulus.

Is light and feathery? Cirrus.

Looks like a blanket? Stratus.

Sometimes forms thunderheads? Cumulus.

Is called fog when it is very close to earth? Stratus.

Is made of air and ice crystals? Cirrus.

Is often a sign of an approaching storm? Cirrus.

Usually brings light rain or snow? Stratus.

Usually appears during fair weather? Cumulus.