| A | B |
|---|
| cycle | a repeated pattern that moves from beginning to middle to end and back to the beginning again |
| water cycle | movement of water from the ground to the air and back to the ground; the sun is the main force of energy for this cycle |
| evaporation | moisture that is changed from a liquid to a gas |
| condensation | moisture that has changed from a gas to a liquid |
| precipitation | moisture that falls to the ground |
| rotation | the act of spinning on an axis |
| axis | an imaginary line through the center of the earth around which the earth rotates |
| orbit | a closed, curved path that an object follows as it moves around another object |
| revolution | movement of an object in an orbit around another object |
| season | the result of the tilt of the earth on its axis and the earth's position in its orbit around the sun |
| phases | the shape of the lighted part of the moon as it is seen from the earth |
| solar eclipse | when the sun's light is blocked form the earth by the moon |
| lunar eclipse | when the moon cannot reflect light from the sun because the earth is between the sun and the moon. The mmon has moved into the earth's shadow |
