1. Section 3: Physical and Chemical Changes

2. States of Matter (demo: Marbles in a balloon)
Solid:
Liquid:
Gas:
Plasma:

3. Physical Property: Can be measured with out altering a substance
Methane or obleck demo
Examples:
Density
Hardness
Color
Texture
Conductivity

4. Physical Change: When a material is changed without its chemical properties being altered.
Examples: Ripping paper Melting and freezing Changing volume

5. Chemical Property: Describes a materials reactivity Chemical Change: When a new material is made
Demo:
Burning Magnesium
Balloon explosion
Making hydrogen

6. Checking for understanding

7. Mixtures:
Homogeneous: Two materials are evenly mixed. Examples: Heterogeneous: Two materials are not evenly mixed Pure substance: Only one material is present.

8. Reflection:
Which is a pure substance: Which is a homogeneous Mixture: Can a pure substance be a homogeneous mixture?

9. Ways to separate Mixtures
1) Distillation: Gas vapors are separated by condensation

10. Distillation Process Video:

12. Filtration: Filter paper is used to extract larger particles
Centrifuge: Materials are separated according to density by spinning the solution they are mixed in.
Filtration: Filter paper is used to extract larger particles

13. Desalination: Water is evaporated from salt water to leave pure salt.

14. Textbook Work Please answer all questions in complete sentences!
Pg 47 (11-17)
Pg 55 (28-34)

15. Separating Mixtures Lab
Objective: Students will be given a mixed batch of sand, salt, and iron to separate. Materials: Procedure: Students will write a procedure to separate the mixtures.
Signature by teacher
Sand
Salt
Iron