Chapter 21 Vocab

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Across
  1. 3. What is the time it take for an object to make a complete circle?
  2. 6. What is the name of the planet we live on?
  3. 9. What are units used to measure very large distances?
  4. 10. What planet looks like a rolling ball as it revolves around the Sun?
Down
  1. 1. What is the time an object take to rotate around another object?
  2. 2. What are objects that are made of ice and dust that orbit the Sun?
  3. 4. What planet in our solar system is the hottest?
  4. 5. What are small rocky objects that mainly live together in a belt?
  5. 7. Which of our solar system's moons has an atmosphere?
  6. 8. What planet has the most complex ring system in out solar system?