Earth (characteristics, water cycle...)

1. First part - 3º Social Science

2. 
THE ATMOSPHERE

3. 
 Earth is a planet with a very special characteristic:
AIR.
 Air is a mixture of gases that living things can
breath.
 The atmosphere is the layer of air that surrounds
Earth.
 It is the wall and coat to protect us to the sun’s rays.
The layers of the atmosphere

4. 
The atmosphere

5. 
 Different gases make up the air in the atmosphere.
 You can’t see them, but they have weight and take
up space.
The composition of the atmosphere

6. 
The comoposition of the atmosphere

7. 
THE HYDROSPHERE

8. 
 Most of Earth’s surface is covered by water.
 This layer of water is called the hydrosphere.
 We can find the water in 3 states:
 Liquid water
 Gaseus water
 Solid water
Water on our planet

9. Water’s states
Most od Eart’s water is liquid:
oceans, seas, rivers and lakes.
The water in our atmosphere, like
clouds, is gaseous.
In the coldeest areas of our planet,
we can find water in a solid state:
snow or ice.

10. 
The water cycle
 Water is constantly circulates our planet.
 This is call the water cycle.

11. 
The water cycle

12. 
Taking care of the
environmet

13. 
 When we heat our houses, travel by car or use the
fridge, we produce gases that pollute the air. That is
why it is important to use these machines
responsibly.
How to take care of the atmosphere

14. 
 Take public transport and walk or use the bike.
 Reduce the use of aerosols.
 Look after the trees.
 Switch-off all the lights and fans when not required.
How we can reduce air pollution?

15. 
 We use water at home, in farming, in industry…
 The only water we can use is fresh water, but it is a
limited resource.
 This is why it is so important to use water
responsibly.
How we can take care of water?

16. 
Water treatment process

17. 
 Taking shorter showers.
 Runnind washing machines only when they are full.
 Turning off the tap when brushing your teeth and
washing your hands.
How we can use water wisely?

18. 
1) Match the pictures with the correct water phase.
ACTIVITIES
Liquid water
Gaseous
water
Solid water

19. 
2) Complete the table with examples of these types of
water.
ACTIVITIES
SOLID GASEOUS LIQUID

20. 
3) Complete the gaps with the words on the table.
a) The……………….warms the water in rivers, lakes,
seas and oceans.
a) In the air, water vapour condenses and
forms…………….
a) When a cloud is too heavy, its water falls in the form
of ………………… or snow.
ACTIVITIES

21. 
4) Circle the correct option about protect air and water.
ACTIVITIES

22. 
Which you preffer? Beach or river?
Journal