unit 7:magnetism
TRANSCRIPT
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