Are You a Smart 4 th Grader? Magnetism 1 Every magnet has two poles. What are they called?

Are You a Smart 4th Grader?

Magnetism 1

Every magnet has two poles. What are they called?

Magnetism 1 Answer• Every magnet has two poles. What

are they called?

• North and South

Magnetism 2

• What do you know about the ways magnets repel and attract?

Magnetism 2 Answer

• What do you know about the ways magnets repel and attract?

• North and South Poles attract.

• North and North repel.

• South and South repel.

Magnetism 3

• Which of these will stick to a magnet?

• Iron nail

• Wooden stick

• Brass paper fastener

• Steel wire screen

• Scrap of paper

Magnetism 3 Answer

• Which of these will stick to a magnet?

• Iron nail

• Steel wire screen

Electromagnetism 1

• Explain how to make an electromagnet.

Electromagnetism 1 Answer

• Explain how to make an electromagnet.

• Wrap a long insulated wire around an iron nail.

• Hook one end of the wire to the negative side of a D Cell and the other end to the positive side of the D Cell.

Magnetism 4

• How do you make a temporary magnet?

Magnetism 4 Answer

• How do you make a temporary magnet?

• When a magnet is stuck to a steel or iron nail, the nail becomes a temporary magnet.

Electricity 1

• Which of these will conduct electricity?

• Iron nail

• Wooden stick

• Brass ring

• Steel wire screen

• Scrap of paper

Electricity 1 Answer

• Which of these will conduct electricity?

• Iron nail

• Brass ring

• Steel wire screen

Electricity 2

• Explain how the electric current flows in a battery and bulb circuit.

Electricity 2 Answer

• Explain how the electric current flows in a battery and bulb circuit.

• The current flows through the wire from the negative end of the battery to the filament in the bulb, through the other wire, and back to the positive end of the battery.

Electricity 3

• What is a series circuit?

Electricity 3 Answer

• What is a series circuit?

• A series circuit may have several or many bulbs or motors, but only one pathway to the energy source (battery).

• If one bulb burns out, the circuit is interrupted and all will burn out. (The same is true with motors.)

Electricity 4

• What is a parallel circuit?

Electricity 4 Answer

• What is a parallel circuit?

• Each bulb has its own pathway to the energy source. As long as they don’t burn out, each bulb can continue to shine on its own (even if one of the other bulbs burns out)..

Electromagnetism 2

• How can you make an electromagnet stronger?

Electromagnetism 2 Answer

• How can you make an electromagnet stronger?

• You could use more winds of wire and place the coils carefully next to each other. (Don’t overlap!)

• You could use a stronger battery.

Energy 1

• Name 4 types of energy

Energy 1 Answer

• Name 4 types of energy

Heat energy

Sound energy

Light energy

Magnetic energy

Solar energy

Energy 2

• A toaster oven changes electricity to what kind of energy?

Energy 2 Answer

• A toaster oven changes electricity to what kind of energy?

• Heat energy

Energy 3

• A light bulb changes electricity to what kind of energy?

Energy 3 Answer

• A light bulb changes electricity to what kind of energy?

• Light energy

Magnetism 4

• How does a compass work?

Magnetism 4 Answer

• How does a compass work?

• The core of the earth is a magnet, and the needle of the compass is attracted to it.