Chemical Reactions

6. able to cause damage
7. a group of atoms joined together in a particular way
11. a substance that is added to soil to help plants grow
12. the temperature at which a substance changes from the liquid phase to the gas phase
13. a process in which atoms rearrange to form new substances
15. a starting substance that is part of a chemical reaction
16. an ending substance that is made during a chemical reaction

1. the relative size of things
2. to change the order or position of something
3. something that is made of all the same atoms or groups of atoms
4. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
5. something that can be observed about a substance, such as color, smell, or boiling point
8. letters and numbers showing the types and number of atoms that repeat to make up a substance
9. a structure formed by repeating groups of atoms that link together in a large network
10. the temperature at which a substance changes from the solid phase to the liquid phase
14. the tiny pieces that all matter—all the stuff in the world—is made of