Chapter 21 Lesson 1-2 crossword

12345678910
Across
  1. 4. What are the planets that is closest to the sun called?
  2. 6. What unit is used to find the distance from the Earth to the Sun?
  3. 8. When a planet temperature increases its because of what?
  4. 9. What are objects that are made of gas,dust, and ice and has an oval shaped orbit?
  5. 10. What planet period of revolution takes 1.88 years?
Down
  1. 1. What is the time it takes an object to go around the Sun once called?
  2. 2. What planet diameter is 12,756 km?
  3. 3. What planet atmosphere is about 97% carbon dioxide?
  4. 5. What are millions of small rocky objects?
  5. 7. What planet is the smallest of the inner planets?