UNIT
7: WATER AND AIR ON EARTH
La Ñora, Friday February 21st 2014.
Page 79.
2nd Identify
the different forms of water in photos a-g.
a)
A lake:
liquid water.
b)
Icecaps:
solid water, ice.
c)
A river:
liquid water.
d)
A
reservoir: liquid water.
e)
Clouds:
gas water, water vapour.
f)
A sea, an
ocean: liquid water.
g)
Groundwater:
liquid water.
3rd Copy and
complete the chart.
freshwater
|
saltwater
|
a lake
a river
a reservoir
groundwater
icecaps
clouds
|
oceans
seas
|
4th Choose the correct
word and write the sentence.
Most of the water on Earth
is saltwater.
5th What is the
difference between lakes and reservoirs?
Reservoirs are man-made
lakes for storing freshwater.
Lakes are natural.
Reservoirs are man-made.
6th Where is
air mainly found on Earth?
Air is found mainly in the
atmosphere, which is the layer of gases that surround the Earth.
Page 80.
1st Does air
weigh more than water?
No, it doesn’t.
2nd How can you
investigate this?
Shaking a bottle with both
air a water.
Page 81.
1st What is
wind? Write your answer.
Wind is moving air.
2nd Copy and
order the wind strengths.
breeze à gale à hurricane
3rd Match and
write the sentences.
a)
An
anemometer tells us wind speed.
b)
A weather
vane tells us wind direction.
Page 82.
2nd What is
weather?
Weather is the state of
atmosphere at a certain time in a certain place.
3rd What types
of weather can we experience?
We can experience sunny,
cloudy, raining, windy, snowing and stormy weather.
4th What is the
difference between rain and hail?
When precipitation is
liquid, it is rain.
When it is balls of ice,
it is hail.
5th Look at the
weather map.
a)
Which place
has highest temperature?
Sevilla.
b)
Where is
there precipitation?
In Barcelona, Valencia and
Madrid.
c)
What
season do you think it is?
Winter, because it is snowing in Madrid.
Page 84.
2nd Can we
drink all freshwater?
No, we can’t.
We can only drink clean
freshwater.
3rd Why must we
save water?
We must save water because
people need water, because it is important.
4th How can you
save water?
·
Close the
tap when you are not using it.
·
Have a
shower, not a bath.
Page 85.
1st What is the
water cycle?
The water cycle is the change of state and place of
water.
2nd Order and
copy the sentences about the water cycle.
1)
When the
Sun heats water, water vapour rises.
2)
It turns
into water drops and forms clouds.
3)
The wind
moves the clouds, and the water drops fall as precipitation.
4)
Precipitation
eventually goes into rivers and back to the sea.
5)
Now the
cycle begins again.
Page 88.
1st Copy and
complete the word maps.
Air and water
no smell no
colour no taste weight
Air à atmosphere
Water
·
Oceans
and seas à saltwater
·
Rivers
and lakes
·
Groundwater
·
Icecaps
·
Reservoirs
freshwater
à non-drinking water
2nd True or false? Copy the sentences
and correct the ones that are false.
a)
Oceans
and seas are freshwater. FALSE
Oceans and seas are saltwater
b)
Air and
water have weight. TRUE
c)
Icecaps
and reservoirs are saltwater. FALSE
Icecaps and reservoirs are freshwater.
d)
We can
drink all freshwater. FALSE
We can drink only clean freshwater.
Page 89.
3rd Order the wind speeds from the lightest
to the strongest.
calm à breeze à gale à hurricane
4th Copy and complete the sentences.
All living things need water and air to live.
Air is found mainly in the atmosphere.
Water has three states: solid, liquid and gas.
Most of the water on Earth is saltwater, and only a
little is freshwater.
5th Match, order and write the water cycle
process.
The Sun heats water and water vapour rises.
EVAPORATION.
Water vapour cools and forms clouds. CONDENSATION.
The clouds cool, and water from the clouds falls as
rain or snow. PRECIPITATION.
Precipitation falls to the ground and travels to the
oceans and seas.
COLLECTION.
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