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