Magnetism
What material(s) would be attracted to a magnet. Name at least 2.
Possible answers. Steel, Cobalt, Iron, Nickel
How do you test hardness?
The weaker object would bend, scratch or dent when rubbed against the other object
What is electrical conductivity?
A measure of how well electricity can move through a material.
What is thermal conductivity?
Energy of moving particles
Name 2 examples good electrical insulators.
Possible answers: Wood, Glass, rubber, plastic
What is magnetism?
a forced produced by magnets that pulls some metals
What test would you perform to figure what object is harder?
The scratch test
What do electrical conductors do with electricity?
It allows electricity to flow easily.
Possible answers: copper, aluminum, iron
What object would make a good electrical and thermal insulator? Why?
a) copper penny b) wooden spoon c) iron frying pan d) aluminum foil
b) Wooden spoon because wood is an insulator
What material(s) would not attract magnets. Name at least 2.
Possible answers: wood, plastic, rubber, cloth
Define hardness.
What do electrical insulators do to electricity?
The material slows or stops the flow of electricity
What are good thermal insulators? Name 2.
Possible answers: cloth, wood, and rubber
Why would copper be used to make electrical wires?
It is a good electrical conductor
Explain how Maglev trains work with magnetism.
Which would be harder a pyrite or gold?
Pyrite
Name 2 examples of electrical conductors.
Possible answers. Copper, Gold, Iron, Silver
Why are pots made of iron?
Iron is a good thermal conductor and heats the iron heats the pot which heats the food.
Why would plastic coating be on wires?
To help prevent electrical shocks when someone touches it.
If you dropped a bag of steel paperclips on the floor, what property of matter would you use? How would you use to pick up the paperclips?
Magnetism. I would use a magnet to place it by the steel paperclips so they would stick to the magnet to pick it up.
What is an example of physical change? Why?
a) frying eggs b) toasting bread c)burning wood
d)cutting paper
What pair of objects would be good electrical conductors? Why?
a) cork and eraser b) paper and washer c)paper clip and nail d) plastic button and foil
C) paper clip and nail
Why would someone use cloth pot holders to grab food?
Cloth is a good insulator and the person holding the pot wouldn't get their hands burnt.
What property is affected by electrical insulators?
a) hardness b) conductivity c)magnetism d)texture
B) Conductivity