| A | B |
|---|
| orbit | the path followed by an object in space asit moves around another. |
| revolution | one complete orbit of Earth around the sun. |
| axis | an imaginary line around which a planet turns. |
| rotation | the spinning motion of Earth, like a top on its axis. |
| plate tectonics | the theory that the Earths crust is made of huge, slowly moving slabs of rock called plates. |
| weathering | the breaking down of rocks by wind, rain or ice. |
| erosion | process by which water, wind, or ice wears away landforms |
| atmosphere | the multilayered band of gases that surrounds the earth |
| precipitation | all the forms of water, such as rain, sleet, hail, and snow |
| climate | the weather patterns that an area typically experinces |
