Unit 1 Crossword Puzzle

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Across
  1. 3. The ability to do work; ______ has many different forms
  2. 4. A ________ System is a group of things that interact with one another
  3. 7. _________ is the comparison of a quantity to a standard unit
  4. 8. Stuff of the universe; Every thing is ______
  5. 9. A ________ goal is to understand physics
  6. 11. Explanation
Down
  1. 1. Quality
  2. 2. An educated guess
  3. 5. Quantity
  4. 6. Description
  5. 10. The __ system is used all over the world