1. States of Matter
d. Students know the states of matter (solid, liquid, gas) depend on molecular motion.
e. Students know that in solids the atoms are closely locked in position and can only vibrate; in liquids the atoms and molecules are more loosely connected and can collide with and move past one another; and in gases the atoms and molecules are free to move

2. Matter Matter is anything that has mass and volume.
There are three main types of matter. They are solid, liquid, and gas.
The state of matter is determined by the movement of particles within the matter.

3. Solids Solids have a definite shape and volume
Particles in a solid are closely packed together.
Particles don’t move, but vibrate very closely.
Heat increases that vibration.

4. 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. Can you find an example of each solid?

6. 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. Properties of Liquids 1. Surface Tension
The molecules of a liquid are attracted to and pull towards each other.

8. Properties of Liquids 2. Viscosity
Liquids resistance to flowing –depends on size, shape and attraction between particles.
High Viscosity = Slow Flow
Low Viscosity = Fast Flow

9. Which has the highest viscosity? Lowest viscosity?

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?
What do gas molecules look like in a closed container?
Then, what happens if the container is opened?