SCIENCE
3 – UNIT 8
ENERGY
La Ñora, Monday May 25th 2015.
Page 111.
1st Find some examples of
light, heat and sound in the picture.
Some examples of light are:
Lamps, torches, light bulbs, light
tubes, oven lights, the Sun, the TVs, etc.
Some examples of heat are:
Cookers, ovens, microwave ovens,
heaters, etc.
Some examples of sound are:
Alarm clocks, people and animals
sounds, radios, music players, etc.
2nd How does the house
generate energy?
The house generates energy with solar
panels, windmills and waterwheels.
3rd Find an example of one
type of energy changing into another.
A lamp changes electrical
energy into light energy.
A water wheel changes the
movement (kinetic energy) of water into electrical energy.
A windmill changes the
movement (kinetic energy) of wind into electrical energy.
A solar panel changes the light (light energy) of Sun into
electrical energy.
Page 114.
1st Find five examples of
sound and electrical energy in the picture.
|
sound
energy
|
electrical
energy
|
|
a
car klaxon
a
telephone
a
mobile phone
an
mp4 player
a
walkie talkie
a
dog barking
a
music player
music
a
bird singing
a
guitar
a
guitar amp
headphones
earphones
an
ambulance siren
a
person speaking
traffic
lights bell
|
a
neon sign
an
electric guitar
a
phone
a
car
an
ambulance
traffic
lights
a
walkie talkie
|
2nd Copy and complete the
sentences.
a. A car engine turns chemical energy
into kinetic energy.
b. A radiator turns electrical energy
into thermal energy.
c. A radio turns electrical energy
into sound energy.
Page 116.
1st In your own words,
write definitions for renewable and non-renewable energy.
|
renewable
energy
|
non-renewable
energy
|
|
good
for the planet
never
runs out
can
be used again and again
water
energy
solar
energy
wind
energy
|
bad
for the planet
runs
out
coal
crude
oil
natural
gas
|
Non-renewable energy
sources are the ones that come from the ground and the seabed. They will
eventually run out. Some examples are crude oil, natural gas and coal.
Renewable energy sources
are the ones that do not cause pollution. They do not run out. Some examples
are the Sun, wind and water.
2nd Explain what solar
panels and wind turbines do.
Solar panels turn the
sunlight into electrical or thermal energy.
Wind turbines turn the
wind motion into electrical energy.
3rd What do crude oil, coal
and natural gas have in common? Compare and contrast.
They all have in common
that they are fossil fuels. They are non-renewable energy sources. They will
run out.
The difference is their
state: coal is a solid, crude oil is a liquid and natural gas is a gas.
Page 117.
4th Do you think firewood
is a renewable or non-renewable source of energy? Explain your ideas.
Firewood is a
non-renewable source of energy. You can only use once.
Page 120.
1st Copy and complete.
ENERGY
can be sources
are
kinetic energy
sound energy
thermal energy
chemical energy
electrical energy
light energy
non-renewable renewable
coal solar energy
natural
gas wind farms
crude oil hydroelectric power
1st Unscramble the names of
these common devices.
Microwave, fridge, radio
and dishwasher.
Do we have to plug all of them in?
No, we have to plug all of
them in, excepting the radio. The radio works both with mains and with
batteries.
2nd Copy and correct.
a. Cars turn chemical energy into kinetic
energy.
b. When we eat food, chemical energy
is produced.
c. An oven turns electrical energy
into thermal energy.
d. A TV turns electrical energy into
light and sound energy.
3rd Look at the pictures
and say which type of energy you see.
A. Water energy. An hydroelectric
power station.
B.
Solar energy. Solar panels.
C. Wind energy. A wind farm.
4th Work in pairs. Play the
true or false game.
Pupil A
a. When we move, we produce kinetic
energy.
b. Wind energy is a renewable energy
source.
c. Solar panels turn light energy into
electrical or thermal energy.
Pupil B
a. We mine coal from the ground.
b. The movement of water is a source
of kinetic energy.
c. Firewood is a non-renewable energy
source.
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