1. How can we classify matter?
States of Matter
How can we classify matter?

2. States of Matter
There are three common states of matter: solid, liquid, and gas

3. Solids Definite shape and definite volume
Particles are packed tightly together and held in fixed positions
Particles vibrate about fixed points

4. Liquids Definite volume Takes the shape of its container
Example: Milk in a glass vs. Milk in a gallon jug
Particles can move past each other (fluid)
Fluid – Anything that can be poured
Particles move more rapidly than in a solid

5. Gases No definite shape, takes the shape of its container
No definite volume
Particles are spread far apart and move past each other rapidly

6. Plasma
Plasma is similar to a hot, ionized gas that conducts electricity
Plasma is considered a fourth state of matter
Examples: lightning, stars (sun), and neon signs

7. Changes of State Melting – solid becomes a liquid
Freezing – liquid becomes a solid
Melting and Freezing Points are the SAME TEMPERATURE

8. Changes of State Condensation – gas becomes a liquid
Boiling – liquid becomes a gas
Condensation and Boiling Points are the SAME TEMPERATURE

9. Changes of State Sublimation – solid becomes a gas
Example: dry ice
Deposition – gas becomes a solid