Mr. Bradley's Magnets

Students will be able to explain the interactions between electricity and magnetism are the core of many important technologies.

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Electricity and Magnetism

A maglev train track has electromagnets in it that both lift the train and pull in forward. These trains can travel up to 374 mph.

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Maglev Train

The are electric motors all around you, even where you don't see them. the heating system in your house or school uses electric motors to move hot air or water to hear rooms

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Electric Pumps

Car Manufactures are now producing electric powered vehicles to reduce emission. We have to find ways to save our planet from the harmful chemicals produced by the burning of fossil fuel.

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Electric Motors and Generators

Magnets exert forces on each other. Every magnet has two distinct ends, called the north pole and the south pole.

Permanent Magnets

A doorbell contains an electromagnet. When the button of the bell is pushed, it sends current through the electromagnet. the electromagnet attracts a piece of metal called the striker. the striker moves towards the electromagnet but hits a bell that is in the way.

What is an striker and electromagnet?

​A naturally occurring magnetic material.

Lodstone

A material that is magnetic; it has a north and a south pole

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Permanent Magnet

Magnets we use daily

Magnets are found in some toys. For example, a toy train set often has magnets that attach the carriages to each other, or you can get building blocks that stick together with magnets too.

In compasses, magnets are used to make sure that the needle always points north. Y
In some medical processes, they use magnets. For example, in some scans such as NMR and MRI, powerful magnets are used.

One of the most obvious magnet uses: fridge magnets! They can be used to attach pictures to your fridge. Alphabet magnets can be used to spell out words on your fridge and spell out fun messages!

A toaster tray is pulled down by an electromagnet while bread is toasting. When the toast is done, current is cut off and the tray pops up.

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The Toaster

Draw

Draw a magnet and label the poles.

Multiple Choice

Magnets will not attract..........

• Iron

• Copper

• Metal

• Paper Clips

Multiple Choice

Students in a classroom:

Magnetic or Not?

• Not

• Magnetic

Multiple Choice

Magnetic or Not?

• Magnetic

• Not

Multiple Choice

A Basketball:

Magnetic or Not?

• Magnetic

• Not

Multiple Choice

A couple of guys playing basketball:

Magnetic or Not?

• Magnetic

• Not

Multiple Choice

Magnetic or Not?

• Magnetic

• Not

Multiple Choice

Magnetic or Not?

• Magnetic

• Not

Multiple Choice

Magnetic or Not

• Magnetic

• Not

Multiple Choice

A north pole and a south pole will attract.

• True

• False

Multiple Choice

True or False:
A magnet wrapped in cloth will attract paper clips.

• True

• False

Multiple Choice

What are the parts of the magnet that is attracted to the paper clips?

• the center

• the poles

• the equator

• the horseshoe

Multiple Choice

What material is attracted to a magnet?

• Silver

• Water

• Metal

• Iron

Multiple Choice

What items will a magnet attract?

• Beach ball, glass

• nails, paper clip

• book, paper

• golf ball, glue

Multiple Choice

In this image, matching north poles from two magnets are introduced.  What do you predict will be the outcome?

• There will be no interaction.  The poles of magnets do not have an effect on one another.

• The two north poles will attract each other

• The two north poles will repel each other

• The two magnets will combine and become one magnet

Multiple Choice

Magnets have a north and south______.

• Pole

• Shape

• Color

Multiple Choice

How is Earth's magnetic field similar to that of a magnet?

• It's shaped like a horseshoe.

• It has north and south poles.

• It is made plastic.

• It is hundreds of miles long.

Multiple Choice

Which object is non-magnetic?

• paperclip

• staple

• steel nail

• toothpick

Multiple Choice

Where is the magnetic force the strongest on a magnet?

• at the poles

• in the middle

Multiple Choice

A magnet can pull objects made of

• plastic

• metal

• wood

• glass

Multiple Choice

What does a magnet NOT have

• north pole

• battery

• south pole

Multiple Select

Pick two places where the author says you might find a magnet

• can opener

• car door

• padlock

• refrigerator

Multiple Choice

Which word means: to push away from each other

• attract

• repel

• poles

• seal

Multiple Choice

When two poles attract each other they will

• push away

• snap together

• start a fire

• create electricity

Multiple Choice

What was the author's purpose for writing "Magnets Work"?

• to persuade

• to inform

• to entertain

Multiple Choice

Some trains use magnets to achieve great speeds.

• True

• False

Multiple Choice

The ends of a magnet are called attractors.

• True

• False

Multiple Select

What kinds of metal are magnets attracted to? (Pick more than one)

• iron

• mercury

• steel

• silver

Multiple Choice

Which poles attract?

• opposite

• same

Multiple Choice

Magnetism is a type of ____________

• force

• book

• plant

• animal

Multiple Choice

True or False: A magnetic field is invisible.

• True

• False

Multiple Choice

Amy used a magnet to hold one piece of paper on the refrigerator. Later, she tried to use the same magnet to hold a stack of four pieces of paper, and the magnet wouldn't stick to the fridge. Why did this happen?

• The magnet needs glue

• The magnet couldn't hold due to the thickness of the paper

• Paper repels magnets

• A magnet isn't attracted to the refrigerator.

Multiple Choice

While touching the Van de Graaff generator, each of Zoe's hairs has which of these?

• same charge

• both charges

• opposite charges

• no charge

Multiple Choice

Which of these materials stick to a magnet?

• clothes

• some metals

• food

• plastic

Multiple Choice

This can did not stick to a magnet. What is it made of?

• cobalt

• aluminum

• iron

• nickel

Multiple Choice

Which MATERIALS are NOT attracted to magnets?

• grass, paper and wind

• glass, plastic and wood

• glaciar, pond and water

Multiple Choice

Look at the picture. There are objects around the magnet. Which objects will the magnet attract?

• mouse and button

• plastic block and pencil

• pencil and pad of paper

• paperclip and screw

Multiple Choice

Which MATERIALS are NOT attracted to magnets?

• grass, paper and wind

• glass, plastic and wood

• glaciar, pond and water

Multiple Choice

The image is showing two magnets that are attracted to each other

• True

• False

Multiple Choice

What direction does the magnetic needle of a compass point to?

• west

• east

• south

• north

Multiple Choice

Where on a magnet is the magnetic force strongest?

• The Poles

• All over

• Middle

Multiple Choice

These magnets will _____

• Attract

• Repel

Multiple Choice

Look at the picture. You try to put two magnets together. They repel each other. Which explains why this happened?

• You put like poles together.

• You put opposite poles together.

• The magnets were too close to each other.

• The magnets were too far apart from each other.

Multiple Choice

Look at the picture. The boy is holding a strong magnet near his toy train. The train is made of iron. What will happen next?

• The train will not be attracted to the magnet. Magnets do not attract metal objects.

• The train will be attracted to the magnet. Magnets attract some things without touching them.

• The boy will move the magnet farther away from the train. All magnets must be far from things to attract them.

• The boy will move the magnet closer to the train. All magnets must touch things to attract them.

Multiple Choice

The area around a magnet is called the .....

• attraction zone

• work area

• magnetic field

• hot zone

Multiple Choice

Friction makes objects ______.

• speed up or fly

• slow down or break

• slow down or stop

• speed up or overheat

Multiple Choice

Earth’s gravity pulls objects toward the center of the _____.

• universe

• solar system

• Earth

• moon

Multiple Choice

A force is made up of _____.

• a pull

• a push

• a push or a pull

• none of the above

Multiple Choice

A force can cause an object to change _____.

• gravity

• direction

• friction

• color

Multiple Choice

Which is a force that slows down moving things?

• motion

• friction

• position

• machine

Multiple Choice

Maglev trains float on a cushion of air, eliminating .

• position

• motion

• friction

• none of the above

Multiple Choice

What kind of objects will a magnet attract?

• plastic objects

• lead objects

• aluminum objects

• iron objects

Multiple Choice

What helps Earth act like a gigantic magnet?

• its iron core

• its mountains

• its atmosphere

• its oceans