Chapter 2

3. A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
4. when the reaction is complete, you will have new substances called
5. A characteristic of a substance that describes its ability to change into other substances
7. Anything that has mass and takes up space.
9. Any change that alters the form or appearance of a substance but does not make the substance into another substance
11. The substances you have at the beginning
12. A change in matter that produces one or more new substances is a chemical change, or a
13. A principle that states during a chemical reaction, matter is not created or destroyed.
15. A reaction that releases energy in the form of heat
16. A characteristic of a substance that can be observed without changing the substance into another substance

1. A system in which matter can enter from or escape to the surroundings.
2. A reaction in which energy is absorbed
6. A system in which no matter is allowed to enter or leave.
8. A short, easy way to show a chemical reaction, using symbols instead of words
10. A solid that forms from solution during a chemical reaction is called a
14. The study of matter and how matter changes