| __ | 1. | astronomy | | A. | The study of the moon, stars, and other objects in space |
| __ | 2. | axis | | B. | Line passing through Earth's center and poles |
| __ | 3. | calendar | | C. | Movement of Earth around its axis |
| __ | 4. | equinox | | D. | Movement of Earth around the sun |
| __ | 5. | latitude | | E. | The path of Earth as it revolves around the sun |
| __ | 6. | orbit | | F. | Occurring in the spring |
| __ | 7. | revolution | | G. | Distance from equator, measured in degrees north or south |
| __ | 8. | rotation | | H. | System of organizing time that defines a year. |
| __ | 9. | solstice | | I. | Sun is farthest north or south of the equator at this time |
| __ | 10. | vernal | | J. | The sun is directly overhead at the equator at this time |