Science Chapter 5 vocab

2. thousands of biological catalysts.
5. a solid that forms from liquids in a chemical change
6. matter does not leave or enter
7. change in matter that makes a substance into a other substance
9. a law that states that during a chemical reaction matter is not destroyed or created.
12. when compounds break down into simpler products
14. When two or more elements or compounds combine to make a more complex substance
15. when one element take the place of another element or if two different compounds trade.
16. the amount of a substance in a given volume.
17. energy minimum amount of energy needed to start a chemical reaction.

1. the energy released as the products form is greater than the required energy to break it.
2. The energy to break it is is greater than the energy that is released by the formation of the product
3. New substances that are made
4. Any change to the substance that does not change it to another substance
6. A way to show a chemical reaction using symbols
8. is a number placed in front of a chemical formula
10. Substances that gone through a chemical change
11. A material used to decrease the rate of a chemical reaction
13. matter can enter from or escape to the surroundings
16. increases the reaction rate by lowering the activation energy needed.