Across
- 3. Venus is known as Earth's _____ Planet
- 5. This is the closest planet to the sun
- 6. The inner planets are all _____
- 8. This planet's atmosphere is so thick, it would crush a human.
- 10. How many moons does Earth have?
- 11. How many moons does Mars have?
- 14. It takes 24 hours for Earth to ____on it's axis.
- 16. Earth's _____ is 365.25 days long.
- 17. Earth's surface is 70% ____
- 18. The only known planet that supports life
Down
- 1. The volcano on Mars that is as big as Arizona
- 2. An imaginary line that runs from the North Pole to the South Pole
- 4. Earth is ______ 23.5 degrees on its axis
- 5. "The Red Planet"
- 7. Humans are planning to _____ Mars
- 9. Venus rotates backwards. This is called a ______ rotation.
- 12. The Earth's tilt causes the _____
- 13. Which gas is in the atmosphere along with Oxygen?
- 15. This word means "Earth"