hsh

2.  Gives us light,sound and heat
 Make things move
 Powers machine
 Six forms

3. LIGHT ENERGY
CHEMICAL ENERGY
SOUND ENERGY
KINETIC ENERGY
ELECTRICAL ENERGY
THERMAL ENERGY

4.  Can be natural and man-made (artificial)
Natural: Sun,Stars.
Man-made: Light bulbs and torches.
 Is the faster form of energy 300000 (three
hundred thousand) km per second.
 Made up of seven colors.
 It allows us to see shapes, colours and sizes.
 Travel in a straight line.
 Light can be absorbed,reflected or refracted

5. TORCH
L
I
G
H
T
B
U
L
B
S
The seven colours

6.  Released when a chemical reaction occurs
 Exmples:batteries and food.

8.  Vibration can travel in any dirrections
from the sound.
 Can travel throught gases, liquids and solids
but not througth vaccum.
Large vibrationsloud sounds
Small vibrationssoft sounds

10.  All that move
 Examples:moving car,windsurfer,bike in
movement……….

12.  Used to power machines.
 Can be transformed into ligth,sound,heat and
movement.
 Examples:burning fossil fuels,sundlight,wind,
water and biomass,nuclear power station.

14.  It flows from a warm subtance to a cooler
subtance(this is called heat)
 Examples:the sun,fossil fuels,warm our
houses,
cook food.

16. RENEWABLE ENERGY SOURCES NON-RENEWABLE ENERGY SOURCE
SOLAR ENERGY
WIND ENERGY
WATER ENERGY
BIOMASS
GEOTHERMAL ENERGY
FOSSIL FUELS
URANIUM

18.  Doesen’t pollute.
 Solar panels are used.

20.  Clean.
 Wind turbines are used:
 Only in windy places.
 Can kill birds.
 Can demage habitats.

22.  Doesen’t pollute.
 Dams are used:
 Damage habitats.
 Cause biodiversity loss.

24.  Organic material derived from livings
things(wood,dried vegetion,food waste).
 Causes air pollution.
 Biomass is burnedsteam produced turns a
turbineelectricity.

26.  Heat produced by the descomposion of
underground radioactive subtances.
 Doesen’t pollute.
 Limited to certain geographic areas

29.  Descomposed organic material that has been
deep underground for millions of years.
 Coal:
 Pollutes.
 Produces lots of energy.
 Oil:
 Spills can cause ecological disasters.
 Easy to transpor and store.
 Natural gas.

30. C
O
A
L
O
I
L

31.  Nuclear power stations use a radioctive metal
to generate electricity.
 We have enough to generate electricity for
many centures.
 Stations:
 Are expensive
 Produce radiactive waste products (this can
cause cancer)

33.  Materials can be electrical:
 CONDUCTORScooper,aluminium,iron…
 INSULATORSwood,wool,cotton,paper…
 Two types of electricity:
 CURRENTit’s when an electrical charge
moves(flow) in an electrical conductor
 STATICit’s a form of electricity that doesen’
flow(lightning,hair after brushing it).

34. C
O
N
D
U
C
T
O
R
S
I
N
S
U
L
A
T
O
R
S
W
O
O
D
W
O
O
L
P
A
P
E
R
COTTON
IRON
ALUMINIUM
COOPER

35. S
T
A
T
I
C
C
U
R
R
E
N
T

36.  Magnetism can be natural
 MAGNETITE
 OR MAN-MADE
 MANUFACTURED FROM METALS
 Magnets have two poles:
 NORTH POLE NYN
 SOUTH POLE SYS repel

37. NATURAL
MAN-MADE