Across
- 2. the largest planet in the solar system
- 4. a planet with no atmosphere
- 6. the hottest planet in the solar system
- 7. the four planets closest to the sun are the ______ planets
- 8. The spinning motion of the Earth
- 9. the shape of the Earth
- 10. The path a body travels in space around another object
Down
- 1. Mercury's low gravity means it has no ______
- 3. planets made of rock are called ______ planets
- 5. the time it takes to travel around the earth is the period of __________