This document discusses different forms of energy: light energy from the sun or artificial sources that allows us to see; chemical energy released during chemical reactions like fuel burning in cars; sound energy that travels as vibrations; kinetic energy from moving objects; electrical energy that powers machines; and thermal energy that flows from warm to cool substances and provides heat. It also categorizes energy sources as renewable (solar, wind, water, biomass, geothermal) or non-renewable (fossil fuels like coal, oil, natural gas and uranium used for nuclear power), noting their uses and environmental impacts. In addition, it briefly covers static electricity in charged objects and current/static electricity, as well as magnetism involving magnetic

1. ENERGY
AITANA ARINERO SERNA
5º
UNIT 8

2. ENERGY - GIVES US LIGHT,SOUND AND HEAT
- -MAKES THINGS MOVE
- -POWERS MACHINE
THERE ARE SIX FORMS:

3. LIGHT ENERGY
- MOST OF IT COMES FROM THE SUN.
- NATURAL SOURCES (STARS) OR ARTIFICIAL (LIGHT BULLS OR TORCES)
- FASTEST FORM OF ENERGY (300.000 KM/S)
- MADE UP OF SEVEN DIFFERENT COLOURS
- IT ALLOWS US TO SEE SHAPES, COLOURS AND SIZES
- IT ALWAYS TRAVELS IN A STRAIGHT LINE
EXCEPTION– LIGHT CAN BE ABSORBED, REFLEATED OR REFRACTED

4. CHEMICAL ENERGY
- RELASED WHEN A CHEMICAL REACTION OCCURS
- CAR BURN PETROL – CHEMICAL REACTION—CHEMICAL ENERGY
TRANSFORMER INTO KINECTIC ENERGY
- MORE EXAMPLES: BATTERIES AND FOOD

5. SOUND ENERGY
- IS A VIBRATION THAT CAN TRAVEL IN ANY DIRECTION FROM THE
SOURCE
- LARGE VIBRATIONS—LOUD SOUNDS
- SMALL VIBRATIONS—SOFT SOUNDS
- CAN TRAVEL TROUGHT GASES,LIQUIDS,SOLIDS BUT NOT THOUGHT
VACCUM

6. KINETIC ENERGY
- ALL MOVING THINGS HAVE IT
- THE HAVIER AND OBJETS IS, THE FASTER IT MOVEMENTS AND THE
MORE KINECTIC ENERGY IT HAS.
- E.G.: MOVING CAR, WIND SURFING, BIKE IN MOVEMENT

7. ELECTRICAL ENERGY
- USED TO POWER MACHINES
- CAN BE TRANSFORMED INTO LIGHT, SOUND, HEAT AND MOVEMENT
- SOURCES: BURNING FOSSIL FUELS/SUNLIGHTWIND, WATER AND
BIOMASS/ NUCLEAR POWER STATIONS

8. THERMAL ENERGY
- IT FLOWS FROM A WARM SUBSTANCE TO A COOLER SUBSTANCE.
(THIS FLOW IS CALLED HEAT)
- SOURCES: THE SUN/FOSSIL FUELS(WARM OUR HOUSES, COOK FOOD)

9. RENEWABLE ENERGY SOURCES
( CAN BE REPLACED )

10. SOLAR ENERGY
- DOESN’T POLLUTE
- SOLAR PANELS ARE USED

11. WIND ENERGY
- CLEAN
- WIND TURBINES ARE USED - ONLY IN WIND PLACES
- CAN DAMAGE HABITANDS
- CAN KILL BIRDS

12. WATER ENERGY
- DOESN’T POLLUTE
- DAMS - DAMAGE HABITANS
- CAUSE BIODIVERSITY LOSS

13. BIOMASS
- ORGANIC MATERIAL DERIVADED FROM LIVING THINGS ( WOOD,
DRIED VEGETATION, FOOD WASTE)
- BIOMASS IS BURNED—STEAM PRODUCED TURNS A TURBINE—
ELECTRICIY
- CAUSES AIRPOLLUTION

14. GEOTHERMAL ENERGY
- HEAT PRODUCED BY THE DESCOMPOSITION OF UNDERGROUND
RADIACTIVE SUBSTANCE
- DOESN’T POLLUTE
- LIMITED TO CERTAIN GEOGRAPHIC AREAS

15. NON-RENEWABLE ENERGY SOURCES
(LIMITED)

16. FOSSIL FUELS
DESCOMPOSED ORGANIC MATERIAL THAT HAS BEEN DEEP
UNDERGROUND FOR MILLIONS OF YEARS
-POLLUTES
COAL
- PRODUCES LOTS OF ENERGY
- OIL SPILLS CAN CAUSE ECOLOGICAL DISASTERS
OIL
- EASY TO TRANSPORT OR STORE
NATURAL GAS

18. URANIUM
- NUCLEAR POWER STATIONS USE A RADIOACTIVE METAL TO
GENERATE ELECTRICITY
- WE HAVE ENOUGHT TO GENERATE ELECTRICITY FOR MANY
CENTURIES
- STATIONS - ARE EXPENSIVE
- PRODUCE RADIACTIVE WASTE PRODUCTS

19. ELECTRICITY
STATIC
OBJECTS HAVE ELECTRICAL
CHARGES. THEY CAN BE POSITIVE
OR NEGATIVE CHARGES.
MATERIALS CAN BE ELECTRICAL:
- CONDUCTORS- ( COPPER,
ALUMINIUM)
- INSULATORS- ( WOOD,RUBBER,
COTTON, PLASTIC)
TWO TYPES OF ELECTRICITY:
- CURRENT- IT’S WHEN THAT
DOENS’T FLOW
- STATIC- IT’S A FORM OF
ELECTRICITY THAT DOESN’T
FLOW
CURRENT

20. MAGNETISM
A MAGNET IS AN OBJECT WHICH
CAN ATTRACT CERTAIN METALS
(IRON,STELL…)
MAGNETS HAVE TWO POLES:
NORTH POLE AND SOUTH POLE
N&N
REPEL
S&S
S&N - ATTRACT