Unit 7 Vocab Crossword

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Across
  1. 3. a well-tested explanation of scientific observations and experiments
  2. 6. A cluster of stars twisted around like a spiral. Example: Milky Way Galaxy
  3. 8. a galaxy that has a generally elliptical shape and that has no internal structure or spiral arms
  4. 10. a group of planets and other bodies that revolve around a star
  5. 11. a fundamental unit that is not combined with other units
  6. 12. A set or cluster of stars & dust held by gravity
Down
  1. 1. An object dense enough to trap anything in its gravitational fields at a distance
  2. 2. The distance between the Sun and the Earth
  3. 3. a gigantic explosion of a large star
  4. 4. information that supports or refutes a theory
  5. 5. the galaxy we live that contains the stars
  6. 7. a unit equals equal the distance that light travels in space in one year
  7. 9. a large cloud of gas and dust in space