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
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
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.
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?
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.
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
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.