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Explanation - Electricity and Magnetism Applied in Inventions

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Our Lady of the Loneliness School, Cantillana (Seville) Year 6
Transcript

Our Lady of the Loneliness School, Cantillana (Seville) Year 6

1

In general, objects are electrically neutral because they have no

charges in them.

Is the following statement true or false? Explain why.

All objects around us, such as your body or the stars, have

electrical charges.

- Types of electrical charges:

Objects around us usually have the same number of positive and

negative charges, so they are electrically neutral.

Positive

Negative (This moves from place to place)

1 Follow these instructions and write about the results of this

experiment.

Follow your teacher’s instructions to do an experiment with two

balloons, string and a cloth. Explain the results.

1

- Objects with the same charge repel.

- Objects with opposite charges attract.

Look at these pictures, watch these videos and write about

how you can use this in your invention.

2

An electric current is the flow of electrical charges through

materials.

Electrical

charges

Strong electric

current Electricity

Electricity in an

electric current can

be transformed into

other forms of

energy.

Read and discuss.

2

Materials can be:

- Conductors: Electrical charges can move freely through

these materials.

- Insulators: Electrical charges can’t move through these

materials.

Read and write a list of three conductors and three insulators.

Water is also a conductor of electricity. People are made up

mainly of water, so we are conductors of electricity too. For this

reason, it can be very dangerous to use electrical appliances

near water.

When you are going to use an electrical appliance, make sure

that you, the appliance and everything around you are all dry.

Read and speak about security at home.

3

This provides the electricity. The electrical

charges go from one terminal to the other. This transforms

the electrical

energy into

other type of

energy, such

as kinetic or

light energy.

Cables transport the electricity. They

are connecting wires, usually made of

copper, wrapped in plastic covering.

It controls

the flow of

electricity

by closing

or opening

the circuit.

3 Explain to your partner what the difference between an open and

closed circuit is.

4

In groups, write a list of appliances connected to the electrical grid.

The group with the longest list wins.

A lot of electrical appliances are connected to the electrical grid

through a socket. Every socket is connected by cables to a

national grid.

A national grid gives you the electricity created in power plants.

Read. Where does electricity come from?

4 Read and say if these power plants practise sustainable

development.

Fossil fuels, uranium or

plutonium are used to

heat up the water. This

produces steam, that

moves a turbine which is

connected to a

generator. (Click image to watch video)

Wind moves a

turbine which is

connected to a

generator.

Water moves a

turbine, which is

connected to a

generator.

Heat or light from

the Sun heat water.

The water boils and

produce steam, that

moves a turbine.

THERMAL

POWER

PLANTS

WIND

POWER

PLANTS

HYDROELECTRIC

POWER PLANTS

SOLAR

POWER

PLANTS

4 Debate. Divide the class into four groups and each group will

belong to a power plant. Which one causes the most pollution?

THERMAL POWER

PLANTS

WIND

POWER

PLANTS

HYDROELECTRIC POWER PLANTS

SOLAR

POWER

PLANTS

5

A magnet is an object that attracts other objects made of

magnetic metals.

This attraction is called magnetism.

Magnets have two areas, called poles:

- Opposite poles attract.

- Same poles repel.

Read and answer: What can we use magnetic forces for?

NATURAL MAGNET ARTIFICIAL MAGNET

Magnetite Things made of magnetic metals.

magnetic

forces

Write false sentences to confuse your classmates. Then,

correct your partner’s sentences.

5

The Earth behaves like a giant

magnet and its magnetic poles

are found near the North Pole

and the South Pole.

However, the magnetic poles of

the Earth are opposite to the

geographic poles.

Read and explain to your partner.

north

magnetic

pole

South

magnetic

pole

Work in groups. The needle of a compass is a magnet and its red

part is its north magnetic pole. Why do you think it is used to

orient ourselves?

5

Dictation. Write and discuss.

Freeze the

image!

TEACHER

5

Some animals can notice the Earth’s poles with no compass. This

is very important for migration.

Dictation. Write and discuss.

ELECTRICITY

AND

MAGNETISM

Electrical

charges Electric

current

Electric

circuits Production of

electricity

Magnetism

Negatively charged

Positively charged

Neutrally charged

Flow of electrical charges.

Conductors Insulators

closed

open

Generator

Cables

Switch

Device

Thermal

Wind

Hydroelectric

Solar

power

plants

North

magnetic

pole South

magnetic

pole

Opposite

poles attract

Same poles

repel


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