Thirty percent of the earth's surface is made up of

water

desert

land

cities
i think its land

A, as , to a , as a , is as a. b. c. d.

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

Which of the following terms describes the layers of air surrounding the earth ?