1. Remember this from Page 7R?,
Thermal Energy Heat energy
Vibrate A rapid, back and forth motion
….OK we need to add a little more “energy” to Thermal Energy

2. Changing States of Matter
Add this title to the top of page 11R
Changing States of Matter
A Physical Property

3. Add this to page 11R
Thermal Energy: The total energy of a substance’s particles due to movement or vibration. Something hot will have more thermal energy than when it is cool.
Adding or removing thermal energy makes matter change states.

4. Phase Change is a change from one state (solid or liquid or gas) to another without a change in chemical composition.
ice liquid = phase change for water.
water boils steam = phase change for water.

5. States of matter Copy this to page 11R
Three common states of matter on earth: 1) Solid 2) Liquid 3) Gas Fourth state of matter common in the universe: 4) Plasma

6. States of Matter Copy to page 12R
A solid is matter that has a definite shape and a definite volume. Particles are closely packed. (show video 0 to 2:24)
A liquid is matter that has a definite volume but does not have a definite shape. Particles are more free to move. (2:24 to 4:04)
A gas is matter that does not have a definite shape or a definite volume. Particles are free to move and move fast enough to bounce off each other. (4:04 to 7:57)

7. States of Matter copy to page 12R
Plasma, consider plasma a gas that has been energized and can give off energy.
Plasma is not common on earth but the most common state in the universe.
Examples: fluorescent lights, the Sun (7:57-847)

8. Melting: The change in state of a solid to a liquid.
Page 13R – 15R
Melting: The change in state of a solid to a liquid.
Requires increasing thermal energy so the molecules vibrate faster.
Example - The melting point of ice is 0 deg Celsius.
Melting Point The temperature when melting starts to occur. (video 8:50-11:09)

9. Vaporization: The change in state of a liquid to a gas.
Requires increasing thermal energy.
Two types of vaporization are boiling and evaporation.
Example - The boiling point of water is 100oC.
Vaporization Point The temperature when boiling or evaporation starts to occur. (11:09 – 12:34)

10. 2 kinds of vaporization READ ONLY:
Evaporation: Vaporization that happens ONLY at the surface of a liquid. Due to increasing thermal energy along with air pressure and surface tension
Example: Water evaporates from a lake or ocean.
Boiling: Vaporization that happens at the surface and below the surface of a liquid. Due to adding heat to the substance.
Example: The boiling point of water is 100 deg Celsius.

11. Condensation: The change in state of a gas to a liquid.
Requires decreasing thermal energy. (video 12:35 – 13:06)

12. Freezing: The change in state of a liquid to a solid
this requires decreasing thermal energy so the molecules vibrate slower.
Example - The freezing point of water is 0 deg Celsius.
Freezing Point The temperature when freezing occurs. (video 13:07 to 13:35)

13. Sublimation: Change in state from a solid directly to a gas.
Requires increasing thermal energy
Examples: dry ice, moth balls, snow on very cold day. (video 13:35 – 14:25)
Video questions and discussion (video14:25 to end)

14. Graphic Organizer Place on page 13 L
Solid Liquid Gas
Increase t _ _ _ _ _ _ e _ _ _ _ _
Solid Liquid Gas
Decrease t_ _ _ _ _ _ e _ _ _ _ _

15. Using the word bank draw and label this diagram on changing the states of matter. This goes on page 14L…use a pencil
Melting, Solid, Condensation, Freezing, Sublimation, Gas, Vaporization.
Liquid

16. Changing States of Matter…check your answers
Sublimation
Melting
Vaporization
Solid
Gas
Liquid
Freezing
Condensation