1. States of Matter Lesson 13

2. Activator Cont. List the three types of matter with 3 examples of each
Solid  Rock, wood, Gold
Liquid  Water, mercury, soup
Gas  Air, helium, CO2

3. Solids A Solid has a definite shape and a definite volume
When you move it from place to place, it does not change
It will keep its shape and volume in any position and in any container
Particles is a Solid
The particles that make up a solid are packed very close together
Each particle is tightly fixed in that position
This tightly packed arrangement of particles cause the solid to have a definite shape and volume

4. Types of Solids https://www.youtube.com/watch?v=dtxrtKd-Vao
Two types
Crystalline solids
particles are in a repeating pattern
Melts at specific temperature
Ex. Salt, sugar, snow
Amorphous solids
Particles are not arranged in a regular pattern
Does not melt at a distinct temperature  becomes softer or transforms
Ex. Plastics, rubber
Is glass a crystalline or amorphous solid?

5. Liquids Liquids have a definite volume but no shape of its own
Constant volume
Takes the shape of the container its in
Particles more about freely
Liquids are called fluids meaning “a substance that flows”
Marbles in hand. Particles stay in contact with each other but are able to slide around each other

6. Properties of Liquids Surface Tension Viscosity
Attraction between water molecules is strong
Allows for surface tension
Bugs walk on water
Viscosity
Liquids resistance to flowing
Depends o size and shape of its particles and their attraction
Ex. Honey  High viscosity Ex. Water  Low viscosity

7. Gases Gases have no definite shape or volume Particles more freely
Can be contained but particles will spread once released

8. Reviewing Key Concepts
1. What are some general characteristics of solids
2. How do crystalline solids differ from amorphous
3. How many liquids be described in terms or shape and volume?
4. Explain why a sewing needle can float on the surface of water/
5. Why does a gas have no definite shape or volume?
Be prepared to share. This is a grade