Physics Crossword

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Across
  1. 2. second planet from the sun
  2. 3. the imaginary sphere that surrounds the earth
  3. 8. the splitting of light into a spectrum
  4. 9. Total darkness
Down
  1. 1. groupings of stars that can be seen in the sky. Traditionally used for navigation.
  2. 3. a lens where light is bent inwards
  3. 4. The appearance of the moon in its 28 day orbit of earth
  4. 5. a motion where Mars appears to wander through the sky
  5. 6. Almost total darkness
  6. 7. day the amount of time it takes for the earth to rotate 360