Inner Planets

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Across
  1. 2. air is made mainly of ______________ and oxygen
  2. 3. ______________ is the closest planet to the Sun
  3. 6. the __________ Belt is the field of rocks that separates the Inner Planets from the Outer Planets
  4. 8. the Sun is powered by ____________ reactions
  5. 9. The inner planets are rocky, but the outer planets are _____________
  6. 11. the dust on Mars is made of iron ___________.
Down
  1. 1. this is the word that means rocky type of planet made of rock and metal
  2. 4. Venus was named for the Roman Goddess of _________
  3. 5. the Sun is so big, one ______________ Earths could fit inside of it
  4. 7. __________ has two moons: Deimos and Phobos
  5. 10. Venus is covered in thick clouds of sulphuric __________