Across
- 4. atoms bonded together
- 5. measuring method used in the US
- 8. a set of standard units agreed on by scientists around the world
Down
- 1. a tentative interpretation or explanation of observations
- 2. matter cannot be created or destroyed
- 3. one or more well-established hypotheses
- 6. amount of matter in an object
- 7. what all matter is composed of