1. Chapter Three: Solids, Liquids and Gases Section 1: States of Matter
How can you describe the motion of particles in a solid, a liquid and a gas?

2. Solids
The particles in a solid are closely locked in position and can only vibrate, as they do not have enough energy to slide past one another.

3. There are 2 types of solids:
Crystalline Solids
Amorphous Solids

4. Crystalline Solids: Particles form a regular repeating pattern.
These patterns create crystals.
Examples: Salt, Sugar, Snow, Quartz
Melts at a specific temperature

5. Amorphous Solids: Particles are not arranged in a regular pattern.
Examples: Plastic, Rubber, Glass, Butter
Does not melt at a distinct temperature, may become softer or change into other substances.

6. Liquids
In general, particles in a liquid are packed almost as closely as a solid, but the particles move freely.
Compared to particles in a solid, the particles in a liquid are more loosely connected and can collide with and move past one another.
This is why a liquid flows and has no definite shape.

7. Properties of Liquids:
Surface Tension:
Result of an inward pull among the molecules of a liquid that brings the molecules on the surface closer together
Causes water to bead up and insects to walk on water
Viscosity:
A liquid’s resistance to flowing
Depends on size and shape of particles and attraction between them
High viscosity = slow flow, like honey
Low viscosity = quick flow, like water

8. Gases
In gases, the atoms and molecules are free to move independently, colliding frequently.

9. FLUIDS:
Fluid means a “substance that flows.”
Both liquids and gases are considered fluids.

10. LET’S REVIEW! Crystalline Solid Amorphous Solid
In Which type of Solid do particles form a regular repeating pattern?
Crystalline Solid
What type of solid is butter?
Amorphous Solid

11. LET’S REVIEW! Solid, Liquid, Gas Liquid
What are the 3 States of Matter?
Solid, Liquid, Gas
Which state of matter has a definite volume, but no shape of its own?
Liquid

12. LET’S REVIEW! Solids Low
What state of matter is not considered a fluid?
Solids
Does juice have a high or low viscosity?
Low