Julia Martinez ArizaNerea Silva SanchezAlicia Romero Viñas
Energy is the ability of an object to change things around it. Energy can be mechanical, light, thermal,electrical, chemical or nuclear.
WHAT IS ENERGY?
SOURCES OF ENERGY OTHER SOURCES OF ENERGY
Fuels are sources of chemical energy. Coal, natural gas and petroleum are fuels
Water is a source of mechanical energy.
Wind is a source of mechanical energy.
Uranium and plutonium are sources of thermal energy.
The Sun.
Biomass.
Waves and tides.
Renewable: water, wind, sun, biomass, waves
and tides.
Non-renewable: fuels, uranium and plutonium.
SOURCES OF ENERGY CAN BE:
Electricity is a form of energy: We can transport easily through power
lines. It transform into other types of energy, like
the light energy of a light bulb.
ELECTRICITY
Static electricity:it occurs when an object accumulates electrical charge.
An objetc is neutral when it has the same number of positive and negative charges.
An object is positively charged when it has more positive than negative charges.
An object is negatively charged when it has more negative than positive charges.
Objets with different electrical charges will attract each other, and objets with the same electrical charges will repel each other.
ELECTRICAL CHARGES
Electrical charges move easily through conducting materials.
Electrical charges cannot move through insulating materials like wood, rubber and plastic.
CONDUCTING AND INSULATING MATERIALS
Electric circuit
Conductor
reciverGeneretor
Switch
HYDROELECTRIC POWER STATION
PRODUCTING ELECTRICITY
NUCLEAR POWER STATIONS
PRODUCTING ELECTRICITY
THERMAL POWER STATIONS
PRODUCTING ELECTRICITY
WIND FARMS AND SOLAR POWER STATIONS
PRODUCTING ELECTRICITY
Changes in the landscape. Depletion of non-renewable energy sources. Pollution.
ENERGY AND ENVIROMENT
Turn off the lights. Use public transport. Turn off heaters and insulate homes. Practise the 3 R’s:reduce, reuse and recycle.
USING ENERGY EFFICIENTLY
THE END