1. Energy, states of matter, reactions, physical and chemical changes

2. Physical vs chemical properties
Physical properties
Used to observe and describe matter
Examples:
Color
Shape
Density
Freezing/boiling/melting point
Chemical properties
Describes matter’s potential to undergo chemical change due to its composition
Examples:
Flammability
Reactivity with other chemicals
Oxidation states

3. Chemical change
Change that results in the formation of new chemical substances
The process is irreversible

4. Factors indicating chemical change
Change in color, smell, taste
Presence of light, gas, bubbles and a precipitate

5. Examples chemical change
Burning something
The rusting of a metal

6. Physical change
Type of change where molecules are rearranged but the internal structure is not affected
The process is reversible

7. Factors indicate physical change
Change in state, shape, size

8. Examples physical change
Boiling water
Crumbling a piece of paper

9. assignment Go to tecscience.weebly.com Open the word document
Write the answers in your notebook