Magnetism
Static Electricity
Circuit
Conductors and Insulators
Electromagnets

### 100

What would happen if the north ends of two magnets were close together?
repel

### 100

Socks taken from a clothes dryer that stick together is an example of ____________.
static electricity

### 100

Is a circuit open or closed if you haven't turned on the switch?
open

### 100

What is a material that lets electric current pass through?
a conductor

### 100

True or False: An electromagnet is a permanent magnet.
False. An electromagnet can be turned on or off. Once the circuit is broken, the magnetism is lost.

### 200

If a south end of a magnet is close to a north end of a magnet, the magnets will _________.
attract

### 200

True or False: Like charges attract and unlike charges repel.
False. Like charges repel and unlike charges attract.

### 200

What supplies current to an electrical circuit?
a battery (or other electrical source)

### 200

What is a material that blocks an electric current from passing through?
an insulator

### 200

True or False: An electric crane is an example of an electromagnet.
True

### 300

True or False: All magnets have the same shape and size.
False

### 300

If you rub your hair on a balloon and the balloon becomes negatively charged, what charge will your hair have?
a positive charge

### 300

What part of a circuit does electrical energy change from one form to another?
a load (example: lightbulb) This is where the energy changes to produce heat or light.

### 300

Which of these materials is not a conductor: copper, aluminum, gold, or wood?
wood

### 300

True or False: A refrigerator magnet is a permanent magnet.
True. Even when you take it off the refrigerator, it is still magnetic.

### 400

True or False: All magnets have a north and south pole.
True

### 400

True or False: Positive charges move from one object to another.
False. Only electrons (negative charge) move from one object to another.

### 400

True or False: When you turn on a light, the switch is opening the circuit.
False. A switch closes the circuit to turn on the light.

### 400

Which of these materials is a conductor: rubber, glass, air, silver?
silver

### 400

An electromagnet must be part of an electrical ______.
circuit

### 500

Will a magnet attract copper, rubber, iron, or plastic?
iron

### 500

True or False: A lightning bolt occurs when static electricity is created in the sky.
True

### 500

An electrical circuit is made up of a connector (wire), a load (lightbulb), a switch, and a ____________.
a battery (or electrical source)

### 500

True or False: Pure water is a conductor.
False. The salts and other materials in water are conductors though. So, don't mix water with an electrical circuit!!!!

### 500

An electromagnet is made up of what three items?
an iron bar (nail), battery, and a wire