What happens to the molecules in a substance when they are heated?
The molecules move faster and get further apart. The substance will expand.
What happens to the molecules in a substance when they are cooled?
The molecules move slower and come closer together. The substance will contract.
Give three examples of conductors
Teacher check- metal, metal spoon, flag pole
Give three examples of insulators.
Teacher check- Styrofoam, oven mitt, wooden spoon, plastics
What makes a substance an insulator?
It does not conduct (transfer) energy easily. It keeps hot matter hot or cool matter cool.
What makes a substance a conductor?
It conducts (transfers) energy easily. It quickly looses its heat or cold.
If you left all of these objects in the same room overnight and then checked their temperatures the next day, what would you notice?
They would all be a similar temperature that would match the room temperature.
Why does the liquid in this bottle separate into layers?
The liquids are different densities. The liquid with the most density is on the bottom. The liquid with the least density is on the top.
Which layer in this bottle has the most density?
The bottom layer
Which layer in this bottle has the least density?
The top layer
How is the heat transferring in this image?
The heat is transferring from the warmer water to the colder ice.
Why is the food coloring fully mixed in the hot glass?
In the hot water the molecules are moving faster so the food coloring mixes more quickly.
Why is the food coloring not mixing very much in the cold water glass?
In the cold water the molecules are moving slower so the food coloring mixes slowly.
