Chemical Reaction Vocabulary

3. this reaction is classified as _________.
4. Is a way to show a chemical reaction, using symbols instead of words.
5. This states that during a chemical reaction, matter is not created or destroyed.
7. These cells in your body contain thousands of biological catalyst called _______.
11. Is a number placed in front of a chemical formula in an equation.
13. It increases the reaction rate by lowering the activation energy needed.
14. Is a material used to decrease the rate of a chemical reaction is an ________.
16. Is a substance that undergo the chemical changes.
18. When one element replaces another element in a compound, or if two elements in different compounds trade places, the reaction is called a ___________.
20. Is the amount of a substance in a given volume.
21. Is a reaction that occurs when compounds break down into simpler products.

1. It is the minimum amount of energy needed to start a chemical reaction.
2. Is any change that alters the form or appearance of a substance but does not change it into another substance.
6. Is a change in matter that produces one or more new substances.
8. Is more energy is required to break the bonds of the reactants than is released by the formation of the products.
9. This means matter can enter from or escape to the surroundings.
10. It is a solid that forms from liquids during a chemical reaction.
12. Is the new substance that forms when 2 substances or more are combined.
15. Is the energy released as the products form is greater than the energy required to break the bonds of the reactants.
17. In chemistry when two or more elements or compounds combine to make a more complex
19. This means matter does not enter or leave.