1. Earth Science Intro Unit
Phases of Matter
Earth Science Intro Unit

2. What are the Phases of Matter?
I will be able to define and describe matter and the three Phases of matter.
What are the Phases of Matter?
Matter
All matter is made of atoms.
Atoms are in constant motion.
Particle movement determines the Phase of matter.
Phases of Matter.
Solid
Liquid
Gas

3. What are the Phases of Matter?
I will be able to define and describe matter and the three Phases of matter.
What are the Phases of Matter?
Solids
Shape:
Definite
Volume:
Atoms:
Very close together.
Vibrate in place.
Exception:
Water, ice has more space between atoms than liquid water.

4. What are the Phases of Matter?
I will be able to define and describe matter and the three Phases of matter.
What are the Phases of Matter?
Liquids
Shape:
Not definite
Volume:
Definite
Atoms:
Further apart
Move, have more kinetic energy.
Kinetic energy is the energy of motion.

5. What are the Phases of Matter?
I will be able to define and describe matter and the three Phases of matter.
What are the Phases of Matter?
Gases
Shape:
Not definite
Volume:
Not Definite
Atoms:
Very far apart.
Moving very fast.

6. What is a change in Phase?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What is a change in Phase?
Changes in Phases
A change of a substance from one physical Phase to another.
Examples:
Water vapor to liquid water.
Liquid water to ice.

7. What is a change in Phase?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What is a change in Phase?
Energy Gained or Lost
To change Phase, energy must be added or removed.
Gaining or losing energy changes the temperature of a substance.

8. What happens to matter when a change of Phase occurs?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What happens to matter when a change of Phase occurs?
Energy / Motion of Particles.
Energy of the particles change.
The speed and the distance between particles change.

9. What happens to matter when a change of Phase occurs?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What happens to matter when a change of Phase occurs?
Energy / Motion of Particles.
Solids
Vibrate in place, particles close together

10. What happens to matter when a change of Phase occurs?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What happens to matter when a change of Phase occurs?
Energy / Motion of Particles.
Liquids
Move around
Particles further apart.

11. What happens to matter when a change of Phase occurs?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What happens to matter when a change of Phase occurs?
Energy / Motion of Particles.
Gas-
Move quickly
Particles very far apart.

12. What is a change in Phase?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What is a change in Phase?
Melting
Solid becomes liquid.
Energy is added
Particles speed up.
Temperature rises
Melting point
Temperature at which a substance changes from a solid to a liquid.

13. What is a change in Phase?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What is a change in Phase?
Vaporization
Process by which liquids or solids change to a gas.

14. What is a change in Phase?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What is a change in Phase?
Sublimation
Change in Phase from a solid directly into a gas. (skips liquid Phase)
Add heat
Atoms gain energy
Escape into the air as a gas.
Example: Dry Ice

15. What is a change in Phase?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What is a change in Phase?
Evaporation
Add heat to a liquid
Atoms gain energy.
Move faster
Particles can escape from the surface of a liquid if enough heat is added.

16. What is a change in Phase?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What is a change in Phase?
Boiling
A rapid change from a liquid to a gas (vapor)
Boiling Point
The temperature at which this occurs in a liquid.
100°C
212°F

17. What is a change in Phase?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What is a change in Phase?
Condensation
The change in Phase from a gas to a liquid.
Cooling a gas
Particles lose energy.

18. What is a change in Phase?
I will be able to explain what a change in Phase is and describe how matter changes Phase.
What is a change in Phase?
Freezing
Liquid becomes solid.
Loss of energy.
Particles slow down
Temperature cools
Freezing point
Temperature at which a substance changes into a solid.
Water = 0C or 32F

19. I will be able to explain what a change in Phase is and describe how matter changes Phase.
Eureka – Molecules in Solids   Eureka – Molecules in Liquids   Eureka – Molecules in Gases   Eureka – Volume and Density