Chemical Reactions

4. something that is made of all the same atoms or groups of atoms
7. letters and numbers showing the types and number of atoms that repeat to make up a substance
8. a structure formed by repeating groups of atoms that link together in a large network
13. a process in which atoms rearrange to form new substances
14. the temperature at which a substance changes from the solid phase to the liquid phase
16. an ending substance that is made during a chemical reaction

1. the relative size of things
2. able to cause damage
3. a group of atoms joined together in a particular way
5. the temperature at which a substance changes from the liquid phase to the gas phase
6. a substance that is added to soil to help plants grow
9. to change the order or position of something
10. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
11. a starting substance that is part of a chemical reaction
12. the tiny pieces that all matter—all the stuff in the world—is made of
15. something that can be observed about a substance, such as color, smell, or boiling point