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