1. Match each word with its meaning.
Energy
Transformation
Conductor
Potential
Kinetic moving stored due to height or strain makes everything happen a change from one type to another allows movement of heat and electricity
2. Fill in the missing words.
Tiny particles, height, solar, stretched, ground, strained, chemicals, moving, stored, substance a Kinetic energy is energy that is in ______ objects. b Potential energy is ______ energy. c Elastic potential energy is energy stored inside objects because they are _________ or
________. d Gravitational potential energy is energy due to ______ above the ______. e The energy inside the ________ of a __________ is called chemical energy. f Heat energy is the energy of all the ____ _________ that substances are made of. i The sun makes _____ energy.
3. What are the energy changes in the following: a burning a candle b sliding down a slippery slide c portable radio d solar cell e electric buzzer f jumping onto a trampoline g boiling water over an open fire h steam engine i striking a tuning fork j clothes dryer
4. Describe the three ways in which heat can move from one substance to another

5. Give two reasons why the use of fossil fuels should be reduced.
6. What is the difference between a renewable and a non-renewable energy source? Give two examples of each.
7. The diagram below compares the efficiency of petrol powered and battery powered cars.
Efficiency is a measure of the energy supplied compared to the useful energy obtained. High efficiencies mean only a small loss of energy as heat. Battery powered cars would be recharged through the power points in homes or garages, or their batteries would be swapped for fully charged ones. a Of the 100 units of fossil (coal or oil) or nuclear fuel, how much is ultimately used moving battery powered and petrol powered cars? Which is the more efficient in its use of energy? b Where is the greatest energy loss in petrol powered cars —at the refining, the distribution, or the use in the car? c Where is the greatest energy loss in battery powered cars —at the power station, the distribution, or the use in the car?

G C F U L E W I M J G T T M V Y E U S K
Z D T G N R E E A T P A R P T Z F N O I
Q N N E R A W M S O P E E I X T F T B I
D R R I I A R B T G F H C R T W I E F F
I G N E W P V E Q S J I Q S H S C S B K
Y W C N X G N I N P R D N U O S I M D W
E O Q I U T C A T T L E Z V H T E D G S
S P W Z I C R S C A R A O F M F N U K J
D I W A Z T L E W A T T C Y I P C E G U
F K L M P U L E G M C I U I U J Y G I J
K A I C S E T R A N S F O R M A T I O N
U G C I O K V S C R E T A N R E T L A E
S H L R X K D K O Y G G A A A U H H Y L
H I D T B R D V S P C C W O D L J C U A
Q Y O C J P H R D Y J H U T Y Z X I U S
H U L E T P K Z J C Z C R S Z W H F P T
Y M T L X N O F W Y T P Y C J Y U L Z I
D B E E F J V O K I N E T I C H Q V P C
J H I V T J Z P K O B L X A X Q N W P D
L H B R J Z Z H K I P U F L D T A C V Q
TRANSFORMATION
CHEMICAL
ALTERNATE
WIND
EFFICIENCY
ELASTIC
ELECTRIC
ENERGY
GRAVITATIONAL
HEAT
HYDROELECTRICITY
KINETIC
NUCLEAR
POTENTIAL
SOUND
TRANSFER