Across
- 3. Something that is made of all the same atoms or groups of atoms
- 5. The relative size of things
- 7. The tiny pieces that all matter/stuff is made of
- 8. A object, diagram, or computer program that helps us understand something by making it simpler
- 9. A starting substance that is part of a chemical reaction
Down
- 1. To change the order or position of something
- 2. An ending substance that is made during a chemical reaction
- 4. A process in which atoms rearrange to form new substances
- 6. Something that can be observed about a substance