SCIENCE CROSSWORD PUZZLE

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Across
  1. 2. Because of the force of _ the cloud shrank.
  2. 3. The Earth is not a perfect?
  3. 5. The solar system formed from a cloud of material called?
  4. 7. The earth has a _ at the equator.
  5. 9. The strength of gravity depends on it's?
  6. 10. Earth's entire solid body is called the?
Down
  1. 1. Scientists see the shape of the earth in pictures taken by?
  2. 3. The least dense materials stayed at the _ of the planet.
  3. 4. The Earth has _ systems
  4. 6. Earth's outermost system is the?
  5. 8. All the living things on Earth forms the?