inner planets

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Across
  1. 5. mercury earth venus and mars
  2. 8. the gases that surround a planet
  3. 10. small and dense made of rock
Down
  1. 1. venus
  2. 2. very thick atmosphere that traps heat
  3. 3. moves repeatedly around
  4. 4. celestial object that orbits a planet
  5. 6. last of inner planets and thin atmosphere
  6. 7. closest to the sun
  7. 9. only planet with life and that can support life