| A | B |
|---|
| axis | imaginary straight line through the center of the earth around which the earth rotates |
| rotation | the act of spinning on an axis |
| orbit | a closed, curved path that an object follows as the object moves around another object |
| revolution | movement of an object around another object |
| satellite | object that revolves around another object |
| phase | the shape of the lighted part of the moon as it is seen from the earth |
| moon | the natural satellite of the earth |
| tides | the constantly changing boundary between the coast line and the sea |
