Exploring Magnetic Fields

Magnets and Magnetic Fields

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Open Ended

Write at least three things that you know about magnets

Keywords

• By the end of the lesson you should understand and be able to use these key words:

• Permanent magnet

• Magnetic material

• Induced magnet

• Poles

• Plotting compass

Magnets and Magnetic materials

• Permanent magnets are materials that are always magnetised

• Some materials are attracted to magnets. These magnetic materials consist of iron, nickel or cobalt.

• Lodestone is a naturally occuring magnetic material that was used in early compasses.​

• Look at the picture - what would happen if you brought a permanent magnet near the metals?

Multiple Choice

Which is an example of magnetic object?

• gold earrings

• silver cup

• cobalt rod

Multiple Choice

What do you call the group of objects that are attracted to magnets?

• Non-Magnetic Objects

• Metallic Objects

• Magnetic Objects

Multiple Choice

True or False: All metals stick to magnets.

• True
• False

Multiple Choice

Which two metals will be attracted by a magnet?

• iron and steel
• gold and silver
• aluminum and lead
• copper and cobalt

Multiple Choice

A magnet will NOT attract ...

Multiple Choice

A magnet will attract ...

Multiple Choice

Which these materials are magnetic?

• copper, iron, steel, nickel

• Aluminium, iron, steel, nickel

• Iron, cobalt, steel, nickel

• Cobalt, magnesium, steel, nickel

Multiple Choice

Steel is magnetic because ....

• it is a metal

• it contains iron

• it contains carbon

• all of the above

Multiple Choice

How is magnet used in the picture?

• hold objects

• show direction

• lift heavy objects

Multiple Choice

9. Which is an example of a natural magnet?

• Lodestone

• U shape magnet

• Ring magnet

Video task

Watch the video, (up to 1.5 mins) (201) Magnets | Magnetism | Physics | FuseSchool - YouTube

Then answer the next questions

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(73) Magnets | Magnetism | Physics | FuseSchool - YouTube

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Multiple Choice

Magnets have a north and south______.

• Pole
• Shape
• Color

Multiple Choice

What will happen when two unlike poles of magnets put together?

• They attract each other

• They repel each other

Multiple Choice

When "like" poles meet, they ______________.

• Attract each other

• Repel each other

Multiple Choice

A north pole and a south pole will attract.

• True
• False

Multiple Choice

What happens when two north poles of a magnet are placed together?

• they repel
• they attract
• they cancel each other out
• the strength of the magnet is doubled

Multiple Choice

Magnetism is a type of ........

• gravity

• relationship

• force

Multiple Choice

The space around a magnet where the force of a magnet can attract best is called __________

• magnetism

• a bar magnet

• a magnetic field

Multiple Choice

True or False: A magnetic field is invisible.

• True
• False

Multiple Choice

The magnetic field lines around a magnet can be shown by sprinkling ________________ around it.

• aluminium filings

• iron filings

• powdered carbon

Fill in the Blank

To find the direction of the magnetic field lines we need to use a .......

Multiple Choice

In which part of a magnet is the magnetic force strongest?

• In the Center

• At the Poles

• At the North Pole only

Multiple Choice

Why are magnetic field lines closest together at the poles?

• Magnetic force is weaker

• Magnetic force is stronger

Multiple Choice

The further two magnets are apart, the __________________ the force of magnetism.

• stronger
• weaker
• same

Draw

Draw the field lines around this magnet. Note where the field is strongest, and the correct direction of the field

Multiple Select

How did you do? Be honest and check all that apply !

• I drew at least four lines in the correct shape

• My lines were closer together at the poles than inbetween

• None of my lines crossed

• I had at least two arrows pointing from north to south and none from south to norht

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 isn't attracted to the refrigerator as the refrigerator is made of plastic

• The paper was too thick, the magnetic field lines are further apart from each other.

Video task

Watch the rest of the video,

(201) Magnets | Magnetism | Physics | FuseSchool - YouTube

Then answer the next questions

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(73) Magnets | Magnetism | Physics | FuseSchool - YouTube

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Multiple Choice

What would we call a paper clip in the presence of a magnetic field

• induced magnet

• non metal

• permanent magnet

Multiple Choice

A n iron nail is attached to a magnet. A paper clip is attracted to the nail. Why?

• The iron nail is a permanent magnet and has a permanent magnetic field

• The iron nail is an induced magnet with an induced magnetic field

• The paper clip is a permanent magnet with it's own magnetic field.

Multiple Choice

What happens if the magnet is removed from the nail?

• the paperclips stay magnetised and the paper clip remains attracted to it

• the iron nail looses its magnetism but the paper clip stays attached to it

• the magnetic field around the iron nail disappears and the paper clip falls off the nail

Multiple Choice

What happens to the magnetic field of an induced magnet when it is moved far away from a permanent magnet?

• It gets greater.

• It stops being produced.

Multiple Select

What is the difference between a permanent magnet and an induced? Check all correct answers

• Permanent magnets do not produce their own magnetic field.

• Permanent magnets produce their own magnetic field.

• Induced magnets are always magnetic.

• Induced magnets only magnetised when they are in the presence of another magnetic field.

Multiple Choice

True or false? The force between a permanent and an induced magnet is always repulsive?

• True

• False

Earth's magnetic field

• Watch the video then answer the questions

• Earth and Compasses | Magnetism | Physics | FuseSchool - Bing video

• (73) Earth and Compasses | Magnetism | Physics | FuseSchool - YouTube​

Multiple Choice

Why do magnets point close to the earth's North pole?

• The bar magnet inside the compass line up with the Earth's magnetic field.

• The south pole of the Earth's magnetic field is actually what we call the North Pole.

• The law of attraction. The north pole of the magnet is attracted to the magentic south pole of the earth.

• All of the above.

Multiple Choice

True of force - Magnetic north is at the North Pole

• True

• False

Multiple Select

The magnetic field around the earth....(tick all that apply)

• Protects us from aliens

• Protects us from solar winds that strip the atmosphere

• Changes direction every few hundred thousand years

• Is the same shape as the field around a bar magnet.

Open Ended

Write one thing you have learnt in this quizziz