1. #22 Phases of Matter

2. PHASES OF MATTER
Matter on Earth can exist as 4 different phases or states.
Solid
Liquid
Gas
Plasma

3. SOLID Has a definite volume and a definite shape.
The atoms or molecules in a solid are strongly attracted to one another and tightly packed.
Examples:
Rocks
Desk
Apple

4. LIQUID has a definite volume but no definite shape.
The atoms or molecules in a liquid are attracted to each other, but not as strongly as those of a solid.
Particles are free to move over and around each other.
Water
Blood
Milk

5. GAS Has no definite volume and no definite shape.
The atoms or molecules of gases have very little attractive force on each other. This causes them to move freely and independently.
The atoms or molecules move apart until they’re evenly spaced throughout the container they are placed in.
Examples:
Air (mixture of different gases)
Water Vapor (water in a gas form)

6. Solid / Liquid / Gas Particles

7. Plasma
Most of the matter in the universe, like the stars and sun, is in the plasma state.
Is an electrically charged gas
Plasma exists at very high temperatures and pressures.

8. Plasma on Earth On Earth, plasma is found in lightning bolts.
Also in Plasma TV’s, Fluorescent Bulbs, and Neon Signs!

9. Examples of Particles Moving

10. PHASE CHANGES
List the following phases changes as Activity #26 in your notebook. Indicate the matter phase change that happens (i.e. solid  liquid)
Melting
Evaporation
Sublimation
Freezing
Condensation
Deposition

11. PHASE CHANGES Matter will change phases when heat is added or lost.
Melting: solid  liquid (heat is added)
Sublimation: solid  gas (heat is added)
Evaporation: liquid  gas (heat is added)
Freezing: liquid  solid (heat is lost)
Condensation: gas  liquid (heat is lost)
Deposition: gas  solid (heat is lost)

12. PHASE CHANGES SUBLIMATION DEPOSITION Gas Condensation Liquid Freezing
Evaporation
Condensation
Liquid
DEPOSITION
SUBLIMATION
Freezing
Solid
Melting