inner planets

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Across
  1. 3. they are made up of mostly rock
  2. 7. layers of gases surrounding a planet or other celestial body
  3. 8. it has a thick atmosphere
  4. 10. earth like object in some ways
Down
  1. 1. known as the red planet
  2. 2. a collection of 8 planets
  3. 4. moves repeatedly around
  4. 5. it is a celestial object
  5. 6. has the shortest orbit around the sun
  6. 9. contains water & oxygen needed for life