Inner Planets

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Across
  1. 1. Venus is about the same _____ as Earth.
  2. 6. A large, round object that revolves around a star and has a clear orbit.
  3. 8. Venus is the ______ planet in the solar system.
  4. 11. Mercury has little to no ____, so heat cannot be held in.
  5. 13. The _____ belt is what divides the inner planets from the outer planets.
  6. 15. Venus is covered in toxic _____ made of sulfuric acid.
  7. 16. Mercury is extremely ____ during the day and extremely cold at night.
  8. 17. We have sent many _____ to mars to take pictures and collect samples of the planet.
  9. 19. The Inner Planets are also known as the _____ Planets.
  10. 21. The only star in our solar system that the planets orbit around.
Down
  1. 1. Mercury is the _____ planet in the solar system.
  2. 2. Earth is the only known planet with ____ water.
  3. 3. The second planet from the sun
  4. 4. Mercury, Venus, Earth, and Mars are the ______ planets.
  5. 5. Mars has terrible ____ storms.
  6. 7. The planet closest to the sun
  7. 9. Mars is commonly known as the ____ Planet.
  8. 10. Mars has ____ tiny moons.
  9. 12. Earth has exactly one ____ named Luna.
  10. 14. The third planet from the sun
  11. 18. Mars has the biggest _____ in the solar system, it's even bigger than Mount Everest.
  12. 20. The fourth planet from the sun