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