Chemical Reactions

3. an ending substance that is made during a chemical reaction
5. a group of atoms joined together in a particular way
6. a substance that is added to soil to help plants grow
8. the relative size of things
10. the temperature at which a substance changes from the solid phase to the liquid phase
13. able to cause damage
15. a structure formed by repeating groups of atoms that link together in a large network

1. the tiny pieces that all matter—all the stuff in the world—is made of
2. a process in which atoms rearrange to form new substances
4. to change the order or position of something
7. a starting substance that is part of a chemical reaction
8. something that is made of all the same atoms or groups of atoms
9. letters and numbers showing the types and number of atoms that repeat to make up a substance
11. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
12. the temperature at which a substance changes from the liquid phase to the gas phase
14. something that can be observed about a substance, such as color, smell, or boiling point