Across
- 6. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
- 7. a starting substance that is part of a chemical reaction
- 8. the temperature at which a liquid will begin to boil and turn to vapor
- 10. the relative size of things
- 11. the tiny pieces that all matter-all the stuff in the world-is made up of
Down
- 1. an ending substance that is part of a chemical reaction
- 2. to change the order or position of something
- 3. something that is made of all the same atoms or groups of atoms
- 4. the temperature at which a solid will begin to melt and turn to liquid
- 5. a process in which atoms rearrange to form new substances
- 9. something that can be observed about a substance, such as its color, smell, or boiling point