Chemical Reactions

6. able to cause damage
8. a group of atoms joined together in a particular way
10. to change the order or position of something
11. the temperature at which a substance changes from the solid phase to the liquid phase
12. a process in which atoms rearrange to form new substances
15. a starting substance that is part of a chemical reaction
16. something that can be observed about a substance, such as color, smell, or boiling point

1. a structure formed by repeating groups of atoms that link together in a large network
2. the relative size of things
3. letters and numbers showing the types and number of atoms that repeat to make up a substance
4. something that is made of all the same atoms or groups of atoms
5. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
7. the temperature at which a substance changes from the liquid phase to the gas phase
9. an ending substance that is made during a chemical reaction
13. a substance that is added to soil to help plants grow
14. the tiny pieces that all matter—all the stuff in the world—is made of