Unit 7:Magnetism

UNIT 7: MAGNETISM

Nuria Sánchez Parra

CEIP García Bellido

VOCABULARYAbility…propiedad, capacidad

Act…actuar

Always …siempre

Attract …atraer

Because of this…por esto

Break …romper

Card…tarjeta

Compass…brújula

Core …núcleo

Each other…el uno al otro

Features…características

Get …obtener

Half….mitad

Iron…hierro

Lock ….cierre

Magnetism….magnetismo

Magnetite…magnetita

Magnets…imanes

Needle …aguja

Nickel…níquel

North …norte

Pair …pareja

Point…apuntar

Pole …polo

Repel …repeler

Same ….mismo

South …sur

Storing …almacén

Strip…banda

Theft…robo

Together…juntos

Magnets

Some materials have the ability to attractsome metals. This ability is called magnetism.Magnets have this ability.

There are two types of magnets:

• Natural magnets. They are minerals that attract iron, such as the magnetite.

• Artificial magnets. People make magnets from metals. For example, the magnets we use on the fridge.

All magnets have two parts: north pole (N) and south pole (S).

Magnets featuresThey have two important features:

• When we break a magnet in half, we get two magnets with their corresponding north and south poles. You can’t separate the poles of a magnet.

• When we put two magnets together, two different things can happen:

– Same poles repel each other.

– Different poles attract each other.

VIDEOS

• Video 1

• Video 2

• Video 3

• Video4

The magnetic poles of the Earth

The Earth’s core is made up of iron and nickel. Because of this, the Earth acts like a magnet.

It has a north magnetic pole and a south magnetic pole.

We can detect the Earth magnetism with a compass. The compass has a magnet needle that always points to the north magnetic pole

Uses of magnetism

Magnetism is very useful for:• Orientation, with the compasses.• Magnets. They are used in lock doors, bags,

electric motors and clocks.• Storing information, such as in credit cards,

computer discs and mobile phones.• Control. It is used in clothes and books to prevent

theft.• Identification. There are magnetic strips on train

and plane tickets or in medical cards.

Uses of magnetism

ACTIVITIES

• Write a sentence with each pair of words to summarize.– magnets-poles

……………………………………………………………………………………– repel-attract

……………………………………………………………………………………– information-control

……………………………………………………………………………………

• What happens?

– …………………………………………………………………………

– ……………………………………………………………………………

• Match the two parts of each sentence.

• A compass can

• Magnets

• Magnets can be

• The poles of a magnet

• Magnetism has

• natural or artificial

• cannot be separated

• have two poles

• many different uses

• detect the Earth’s magnetism