By Ana and Deborah

WHAT´S ENERGY? Energy is the ability of an object to

change things around it. Energy can be mechanical , light , sound

, thermal electrical , chemical or nuclear

SOURCES OF ENERGY Can be:

Renewable such as water, wind, sun, biomass or waves and tidies

Non Renewable such as fuels or uranium and plutonium

ENERGY TRANSFORMS Our bodies transform chemical energy

from food into mechanical energy for movement.

ELECTRICITY Electricity is a form of energy :• We can transport it easy through power

lines.• It can transform into others types of

energy, like the light energy of a light bulb.

ELECTRICAL CHARGES Static electricity : it occurs when an

object accumulate electrical charge. It can be :

Neutral Positively charge Negatively charge

CONDUCTING & INSULATING MATERIALS• Conducting materials : electrical charges

moves easily through them.• Insulating materials : electrical charges

cannot move through them.

ELECTRICAL CURRENT Electrical current is the movement of

electrical charges through a conducting material.

PRODUCING ELECTRICITY

HYDROELECTRIC POWER STATION

NUCLEAR POWER STATION

THERMAL POWER STATIONS

WIND FARMS & SOLAR POWER STATIONS

ENERGY AND THE ENVIRONMENT Producing and using electricity cause

problems to the environment.

Changes in landscapes Depletion Pollution

USING ENERGY EFFICIENTLY Use public

transport

Turn off heaters Practise the 3 R`s

WHAT`S MAGNETISM ? Magnetism is the ability of materials to

atract metals.

CHARACTERISTICS OF MAGNETS

All magnets have two parts, their north poles (N) and their south poles (S)

THE MAGNETIC POLES OF THE EARTH

ELECTROMAGNETISM