Across
- 3. when a planets atmosphere traps solar energy and causes the surface tempature to increase
- 4. Millions of small rocky objects
- 6. The time it takes for an object to travel once around the sun
- 8. a round depression formed on the surface of a planet or moon
- 9. The 4 largest moons of jupiter
- 12. the time it takes an object to complete one rotation
Down
- 1. Planets closest to the sun that are made of rocky materials
- 2. The avergae distance from the earth to the sun.
- 5. A small rocky particle that moves through space .
- 7. a streak of light in earth s atmosphere made by a glowing meteoroid
- 10. A meteoroid that strikes a planet or a moon
- 11. An object made of gas and dust that orbits the sun