Chemical Reactions

2. the temperature at which a substance changes from the solid phase to the liquid phase
3. letters and numbers showing the types and number of atoms that repeat to make up a substance
5. a starting substance that is part of a chemical reaction
7. a structure formed by repeating groups of atoms that link together in a large network
8. a process in which atoms rearrange to form new substances
11. to change the order or position of something
12. the tiny pieces that all matter—all the stuff in the world—is made of
16. a substance that is added to soil to help plants grow

1. the temperature at which a substance changes from the liquid phase to the gas phase
4. a group of atoms joined together in a particular way
6. an ending substance that is made during a chemical reaction
9. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
10. able to cause damage
13. something that is made of all the same atoms or groups of atoms
14. something that can be observed about a substance, such as color, smell, or boiling point
15. the relative size of things