Chemical Reactions

3. able to cause damage
6. letters and numbers showing the types and number of atoms that repeat to make up a substance
11. an ending substance that is made during a chemical reaction
12. the temperature at which a substance changes from the solid phase to the liquid phase
13. a substance that is added to soil to help plants grow
15. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
16. something that can be observed about a substance, such as color, smell, or boiling point

1. something that is made of all the same atoms or groups of atoms
2. the temperature at which a substance changes from the liquid phase to the gas phase
4. a starting substance that is part of a chemical reaction
5. a structure formed by repeating groups of atoms that link together in a large network
7. a group of atoms joined together in a particular way
8. to change the order or position of something
9. a process in which atoms rearrange to form new substances
10. the relative size of things
14. the tiny pieces that all matter—all the stuff in the world—is made of