chapter 21 les. 1 and 2

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Across
  1. 1. what is the planet closest to the sun?
  2. 3. around the Sun?
  3. 5. what is the motion a planet goes around the sun called
  4. 7. effect what is the process that traps heat from the sun
  5. 8. what is the hottest planet in the solar system?
  6. 9. what are the small rocky objects that orbit the sun?
  7. 11. what is the red planet's name?
  8. 12. what is the only inner planet to CURRENTLY support life?
Down
  1. 2. what is the spinning motion a planet does called?
  2. 4. planets what are the four inner planets scientifically
  3. 6. what are made of ice dust and gas and move in a oval-like
  4. 10. of a planets atmosphere?