| __ | 1. | asteroid belt | | A. | Jupiter, Saturn, Uranus, and Neptune |
| __ | 2. | carbon dioxide | | B. | The eighth planet from the sun in the soar system. |
| __ | 3. | craters | | C. | a gas with no colour or odour. A mixture of carbon & oxygen. |
| __ | 4. | greenhouse effect | | D. | A bowl-shaped hole on the surface of a planet. |
| __ | 5. | moons | | E. | The smallest planet (actually dwarf planet) |
| __ | 6. | Neptune | | F. | The sixth planet from the sun. It has two bright rings. |
| __ | 7. | outer planets | | G. | Any planet's natural satellite |
| __ | 8. | Pluto | | H. | A concentration of celestial bodies between Mars & Jupiter. |
| __ | 9. | Saturn | | I. | The 2nd planet from the sun with a dense, cloudy atmosphere. |
| __ | 10. | Venus | | J. | The warming an an atmosphere from gases. |