Chapter 21 Lesson 1-2 Crossword Puzzle

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Across
  1. 2. Which planet is the smallest and closest to the sun?
  2. 3. Which is the second planet from the sun and is the hottest?
  3. 4. What is a object that is made of gas,dust and ice and moves around the Sun?
  4. 7. What are the planets called that are closets to the sun and is made of rock and metal?
  5. 8. What are millions of small,rocky object that orbit the Sun?
  6. 9. Which planet is the third and the atmosphere provide life?
  7. 10. What distances that are too large for Astronomers to use?
Down
  1. 1. What happens when a planet atmosphere traps solar energy?
  2. 5. What period do the Earth go through that takes one day to complete?
  3. 6. What Period do the Earth go through that takes one year to complete?