/ Chapter 21 Lesson 1,2 & 3 Crossword Puzzle. /

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Across
  1. 2. Planets What is Jupiter,Saturn,Uranus and Neptune?
  2. 3. Unit What is the average distance from earth to the Sun?
  3. 7. What are millions of small rocky objects?
  4. 9. What occurs when a planet's atmosphere is traps solar energy?
  5. 10. Planets What is made of rock and ice and is much smaller than earth?
Down
  1. 1. What is the time it takes an object to travel once around the sun?
  2. 4. Planets What is Mercury,Venus,Earth and Mars?
  3. 5. planets What are the planets closest to the Sun?
  4. 6. What is made of gas, dust, and ice and moves around the Sun?
  5. 8. What is the second planet from the sun?