Science crossword year 7

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Across
  1. 3. the time it takes for the earth to orbit the sun.
  2. 5. a natural satellite
  3. 7. force in space
  4. 8. number of planets in our solar system.
Down
  1. 1. one rotation of the earth
  2. 2. something that orbits
  3. 4. the time for the moon to take one full rotation.
  4. 6. when something rotates due to gravity.