1) The document discusses the atmosphere, air, and weather. It defines the atmosphere, explores the layers of the atmosphere and their properties, and examines sources of air pollution and tools for measuring weather. 2) The Earth's atmosphere is composed of air, which is made up of nitrogen, oxygen, and carbon dioxide. The properties and importance of air are also discussed. 3) Key topics covered include the composition, properties, and importance of air, definitions of weather and the atmosphere, air pollution sources, and weather measuring instruments.

1. The atmosphere,
air and weather.
UNIT 9

2. UNIT 9
We are going to learn…
•Definition, sketch and parts of the atmosphere.
•Air pollution sources.
•Definition of weather.
•Weather forecasts.
•Weather measuring instruments.
•Composition, properties and importance of air.

3. The Earth
< Lower layer
< Upper layers
< Outer space
The atmosphere is the layer of gases that
sourrounds the Earth.

4. < Lower layer
We can breathe in this part.
There is air.
Weather occurs here.

5. < Upper layers
We can’t breathe in this part.
Living things can not survive here

6. < Outer space
There isn’t air.
There aren’t living things

7. Outer space
There isn’t air.
There aren’t living things
Upper layers
We can’t breathe in this part.
Living things can not survive here
Lower layer
There is air.
We can breathe in this part.
Weather occurs here.
The atmosphere is the layer of gases
that sourrounds the Earth.
THE ATMOSPHERE

8. THE EARTH’S ATMOSPHERE IS MADE UP OF AIR
AIR = NITROGEN + OXYGEN + CARBON DIOXIDE

9. Smoke stacks
Motor vehicles
Aerosol sprays
Volcanic activity
Controlled Burn
Toxic gases

11. SUNNY CLOUDY CLEAR RAINY WINDY
HUMID HOT WARM COLD COOL
SNOWY FOGGY WET HUMID ICY

13. This is the weather in Spain today. In the north it’s
cloudy, in the west it’s rainy, in the east it’s foggy
and in the south it’s sunny.

14. This is the weather in Spain today. In the
north it’s snowy, in the west it’s sunny, in the
east it’s rainy and in the south it’s sunny.

15. MEASURING WEATHER
Thermometer
The thermometer measures
temperature

16. MEASURING WEATHER
Anemometer
The anemometer measures
wind speed

17. MEASURING WEATHER
Rain gauge
The rain gauge
measures rain fall

18. MEASURING WEATHER
Weather vane
The weather vane measures
wind direction

20. AIR = NITROGEN + OXYGEN + CARBON DIOXIDE
NITROGEN, OXYGEN and CARBON DIOXIDE are GASES
The most abundant gas is nitrogen.
The most important gas for animals and people is oxygen.
We breathe oxygen into our lungs and breathe out carbon dioxide.
Plants need carbon dioxide to make their food.
Plants release oxygen into the atmosphere.

21. Gills Gases Air Carbon dioxide Oxygen Air

22. gases
air
gillsair
Carbon
dioxide
oxygen

24. AIR
Composition
???
???
???
Properties
???
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Importance
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???
???
???

25. AIR Composition
Nitrogen.
Oxygen.
Carbon dioxide.

26. AIR
Composition
Nitrogen.
Oxygen.
Carbon dioxide.
Properties
No colour.
No shape.
No taste or smell.
Has weight.

27. AIR Properties
No colour.
No shape.
No taste or smell.
WEIGHT?
NO COLOUR: Air is invisible, it has no colour.
NO SHAPE: It takes the shape of its container.
NO TASTE OR SMELL: It has no taste or smell.
WEIGHT: Is weight a propertie of air?

28. WEIGHT:
SCIENTIFIC METHOD:
EXPERIMENT
DOES AIR WEIGHT?

29. WEIGHT:
Air does have air / Air does not have air

30. WEIGHT:
SCIENTIFIC METHOD:
1 Question:
I wonder if air has got weight.
DOES AIR WEIGHT?

31. WEIGHT:
SCIENTIFIC METHOD:
2 Hypothesis:
I think that if I burst a balloon…
if there is weight, the other balloon will not remain in balance.
if there isn’t weight, the other ballon will remain in balance.

32. WEIGHT:
SCIENTIFIC METHOD:
3 Conduct an experiment:

33. WEIGHT:
SCIENTIFIC METHOD:
4 I discovered:
I discovered that if I burst a balloon with a
pin, the other balloon will not remain in
balance.

34. WEIGHT:
SCIENTIFIC METHOD:
4 Conclusion:
I know that air has weight. A balloon with air
has more weight than other balloon without
weight.

35. AIR Properties
No colour.
No shape.
No taste or smell.
HAS WEIGHT
NO COLOUR: Air is invisible, it has no colour.
NO SHAPE: It takes the shape of its container.
NO TASTE OR SMELL: It has no taste or smell.
HAS WEIGHT

36. AIR
Composition
Nitrogen.
Oxygen.
Carbon dioxide.
Properties
No colour.
No shape.
Has weight.
No taste or smell.
Importance
Hearing.
Flying.
Burning.
Electricity.
Inflate things.

37. AIR Importance
Hearing.
Flying.
Burning.
Electricity.
Inflate things.

38. AIR
Composition
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???
Properties
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???
Importance
???
???
???
???
???

39. AIR
Composition
Nitrogen.
Oxygen.
Carbon dioxide.
Properties
No colour.
No shape.
Has weight.
No taste or smell.
Importance
Hearing.
Flying.
Burning.
Electricity.
Inflate things.

40. We have learnt…
•Definition, sketch and
parts of the atmosphere.
•Air pollution sources.
•Definition of weather.
•Weather forecasts.
•Weather measuring
instruments.
•Composition, properties
and importance of air.

41. The atmosphere
The Earth’s atmosphere is made up of air.
AIR = NITROGEN + OXYGEN + CARBON DIOXIDE

42. 1
2
3 4
5 6

43. Electricity.
AIR
Composition
???
???
???
Properties
???
???
???
???
Importance
???
???
???
???
???
Nitrogen.
Oxygen.
Carbon dioxide.
No colour.
No shape.
Has weight.
No taste or smell.
Hearing.
Flying.
Burning.
Inflate things.