INNER PLANETS

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Across
  1. 4. Venus takes about 8 months to rotate on its ________________
  2. 5. Many of the planets contain this gas in the atmosphere
  3. 6. A landform found on every inner planet
  4. 9. Venus is called Earth's sister______
  5. 10. The planet that is half the diameter of Earth
  6. 12. The planet that has water in three different forms
  7. 13. The polar ice caps on Mars shrink in the _______________
  8. 14. Mercury is the planet closest to the __________
  9. 16. Earth has the only suitable _____________ in the solar system to sustain life
  10. 17. The ______________ of Mercury can get hotter than 420 degrees celsius
Down
  1. 1. Venus’s atmosphere has droplets of________
  2. 2. The surface of Mars is primarily __________________
  3. 3. Earth has at atmosphere primarily composed of _________________
  4. 7. The ___________________ on Mars is about 1% of that on Earth
  5. 8. The planet that has no atmosphere
  6. 10. The orange color on Mars comes from the ______________ of iron
  7. 11. The planet with carbon dioxide and acid rain clouds
  8. 15. Many of the rocky planets are covered in ______________