science

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Across
  1. 1. our solar systems star
  2. 4. To travel around another object
  3. 5. the layer around earth that keeps oxygen on earth
  4. 9. the study of space is called _______.
  5. 10. the point which earth rotates on
  6. 13. the force of earths mass pulling you down
  7. 14. The object orbiting earth
Down
  1. 1. 4 different parts stages of a year caused by Earth's rotation and orbit around the sun
  2. 2. the spinning of an object
  3. 3. the moon has indentations called _______s.
  4. 6. There is no _______ on the moon.
  5. 7. our earth is a _______
  6. 8. the moons darker spots are called _________s.
  7. 11. the center of a solar system has a ______.
  8. 12. what pulls you to the ground