1. States of Matter
Chapter 3 Section 1

2. Solids Solids have a definite shape and volume
Particles in a solid are closely packed together.

3. Types of Solids 1. Crystalline Solids
Particles form regular, repeating patterns.
Melt at specific temperature
For example: Salt & Sugar & Ice
2. Amorphous Solids
Particles are not arranged in repeated pattern
Do not melt at specific temperature
For example: Rubber, Plastics, Glass

5. Liquids Liquids have a definite volume, but no specific shape.
Particles are packed closely, but they are free to move around and collide with each other.
Fluid: Substance that flows.
Do liquids have a shape of their own?
What shape do liquids take?
Why doesn’t a liquid have a definite shape?
How do the motions of the particles in ice and water differ?

7. Can you think of some examples?
Properties of Liquids
1. Surface Tension
The molecules of a liquids are attracted to and pull towards each other.
Can you think of some examples?
2. Viscosity
Liquids resistance to flowing –depends on size, shape and attraction between particles.
High Viscosity = Slow Flow
Low Viscosity = Fast Flow

8. Surface Tension!

10. Gases No specific shape OR volume
Particles flow freely and either spread out or squeeze together depending on the container
Constantly moving and colliding in all directions
Why don’t gases have a specific shape or volume?
Draw a diagram of gas molecules in a closed container.
Then, draw a diagram of what happens if the container is opened.