Across
- 2. an object, diagram, or computer program that helps us understand something by making it easier to see
- 5. able to cause damage
- 8. group of atoms joined in a particular way
- 9. the tiny pieces that all matter is made of
- 11. atoms rearrange to form new substances
- 12. the temperature at which a substance changes from the solid phase to the liquid phase
Down
- 1. letters and numbers showing the types and number of atoms that repeat to make up a substance
- 3. an ending substance made during chemical reaction
- 4. a starting substance that is part of a chemical reaction
- 6. temperature when liquid changes to gas
- 7. something that is made of all the same atoms or groups of atoms
- 10. a substance that is added to soil to help plants grow
- 13. something that can be observed about a substance, such as color, smell, or boiling point