1. Chapter 2 section 1 Mr. gardner
States of matter
Chapter 2 section 1
Mr. gardner

2. Key concepts What are the characteristics of a solid?
What are the characteristics of a liquid?
What are the characteristics of a gas?

3. Key terms Solid Crystalline solid Amorphous solid Liquid Fluid
Surface tension
Viscosity
gas

4. Solids
Solid: any object that has a definite shape and a definite volume.
Particles in a solid:
The fixed packed arrangement of particles causes a solid to have a definite shape and volume.
The particles are moving back and for the slightly
Types of solids
Crystalline solids: solids arranged in in a regular repeating pattern.
Salts, sugars, and snow
Melts at specific temperatures
Amorphous solids: Particles that are not arranged in a regular pattern
Plastics, rubber, and glass
Does not melt at a distinct temperature
May become softer or change into another substance.

5. liquids
Liquids: a substance with a definite volume but no shape of its own.
Needs a container to maintain a shape.
The particles in a liquid are packed closely but can move around one another freely.
Because its particles are free to move, a liquid has not definite shape but it does have a definite volume.
Fluid: a substance that flows.
Properties of liquids
Surface tension: an inward pull among the molecules of a liquid that brings the molecules on the surface closer together.
Viscosity: a liquids resistance to flowing.
Depends on the size and shape of the particles

6. gases Gas: a substance with no definite shape or no definite volume.
As a gas moves, particles spread apart, filling all the space available. Thus, a gas has neither definite shape or volume.
Air