1. Changes in State of Matter

2. Let’s Review! Solids Have a definite shape and a definite volume
Particles are packed very close together in a fixed position
Particles vibrate in place - low energy
Liquids
Has a definite volume, but no shape
Liquids take the shape of container
particles are freely moving, but still packed close together - medium energy
Viscosity- a liquids resistance to flowing
Gases
Gases have no definite volume or shape
Particles can spread out or be packed close together
Particles bounce around - high energy

3. Kinetic Energy and Matter
All matter is made up of particles that are moving constantly
When heat is added, the particles move faster
When the particles move faster, more space is added between the atoms
As this happens, the state of matter begins to change
When heat leaves the substance, the particles slow down and get closer together

4. Solids expand when they are heated
In the picture to the left, some workers are trying to reconnect two rails that have separated due to the extreme cold. To fix the problem, the workers have lit an oil-soaked rope that lies next to the track. The heat of the fire will cause the tracks to expand so that they can be reconnected once again.

5. Mystery Mud
What properties did the mud have of a liquid?
What properties did the mud have of a solid?

6. States of matter demo

7. How does matter change from one state to another?
A change in thermal energy, or temperature, change a substance from one state of matter to another by adding or taking away energy from the particles of matter
After the video, we will fill out the graphic organizer that goes along with the video and answer the quiz questions

9. Changes in Matter
Melting- the change from a solid to a liquid as the particles gain energy
Freezing- the change from a liquid to a solid as the particles lose thermal energy
Vaporization-the change from a liquid to a gas
Evaporation- vaporization that takes place just at the surface
Boiling-when liquid changes to a gas below the surface
Condensation- when particles of a gas lose enough energy to become a liquid
Sublimation-particles of a solid turn directly into a gas and pass over the liquid state