Magnetism

Magnetism is the word we use to describe a force of ​attraction or ​​ (a)   that can exist between​ (b)   materials.

• repulsion
• ferromagnetic
• metallic
• cohesion

Examples of ferromagnetic materials include...

(Select 3 correct answers)

• Cobalt

• Aluminum

• Gold

• Iron

• Nickel

Every magnet has two ​ (a)   , north and south. When the north and south poles of two magnets are placed in close proximity, they are ​ (b)   to one another. Conversely, when two north poles or two south poles are put together they will experience a force of ​ (c)   .

• attracted
• repulsion
• poles

The force of attraction or repulsion will depend on the strength of the ​ (a)   as well as how close the two magnets are. The closer they are the ​ (b)   the force will be.

• magnetism
• stronger
• weaker
• material

When a magnet is broken down into smaller pieces, each small piece, regardless of how small it is, will have its own pair of north and south poles. This proves that magnetism is caused by behaviour at the ​ (a)   level.

• atomic
• microscopic

Some ferromagnetic objects (such as bar magnets) are able to retain their magnetism indefinitely. They are referred to as ​ (a)   magnets and must be stored and handled correctly in order to avoid ​ (b)   with any nearby magnetically sensitive objects.

• permanent
• interference

Ferromagnetic materials can be turned into magnets by bringing them close to a permanent magnet. Match the images to determine which grain structure has been influenced by a permanent magnet.

(Match the two ignores, Quizziz insists that there has to be three things to match and isn't letting me delete it!!!)

• Permanent magnet present

• 
• Permanent magnet not present

• Ignore

• Ignore

• 

A magnetic field is the region in which the forces created by the magnet have influence. This field surrounds a magnet in ​ (a)   directions, being the ​ (b)   at the end extremities of the magnet, known as the ​ (c)   .

• all
• strongest
• poles

Because unlike poles attract...

• Ignore

• The North Pole of a magnet

• Aligns with North Magnetic Pole of Earth

• The South Pole of a magnet

• Aligns with South Magnetic Pole of Earth

• Ignore

However, the Earth's geographical poles (the one we are most familiar with) is opposite to its magnetic poles meaning...

• Ignore

• The North Pole of a magnet aligns with

• The South Geographic Pole of Earth

• The South Pole of a magnet aligns with

• The North Geographic Pole of Earth

• Ignore