1. Chemical Reaction Notes

2. Matter is everything around you. Matter is anything made of atoms and molecules. Matter is anything that has a mass.

3. Matter can be changed. It can go through physical change or chemical change.

4. Physical changes are a change in state or form that does not result in a new substance being created.

5. Some common examples of physical changes are: melting freezing condensing breaking crushing cutting bending

6. Chemical changes result in the formation of a new substance via a chemical reaction. Energy is required for a chemical change to take place.

7. Chemical Reaction Process in which one or more substance changes to produce one or more new substances with different chemical and physical properties. Process in which one or more substance changes to produce one or more new substances with different chemical and physical properties. During a chemical reaction, molecular bonds are broken and new bonds are made. During a chemical reaction, molecular bonds are broken and new bonds are made.

8. Signs that a chemical change has occurred: production of a gas (bubbles) formation of a new odor production of a precipitate (solid) change of color Energy change given off as light, thermal, or electrical energy

9. Common examples of chemical changes that you may be somewhat familiar with are: digestion respiration photosynthesis burning decomposition

10. Chemical and Physical Changes - Introduction Chemical and Physical Changes