Review the unit

2. What is the atmosphere?
What are the main components of the atmosphere?
Which is the most abundant gas of the atmosphere?
Where is carbon dioxide produced?
Where is oxygen produced?

4. Is the atmosphere homogeneous?
Where are most of the gases concentrated?
Are the gases in motion or static?
How many layers can we identify to study the
atmosphere?. Say the names starting from the closest
to the Earth´s surface.

6. Say the kilometres.
Is the altitude of the troposphere in the poles higher
or lower than in the Equator?. Why?
What happens in this layer?
Does the temperature increase or decrease with
altitude?

7. Kilometres?
What important things happen here?
The temperature with altitude………….

8. Kilometres
What happens in this layer?
The temperature………….

10. It extends from_____ to ________ km
What happens here?
The temperature as we go up in this
layer……………………Why?

11. IT IS THE OUTER LAYER
Is the concentration of gases here, high or low?

12. Carbon dioxide
Oxygen
Water vapour
Nitrogen
The atmosphere. Why is the atmosphere so
important?

16. What is air pollution?
Give examples of pollutants
What are the main air pollution problems?
Is the greenhouse effect an air pollution problem?.
Why?
Say the main greenhouse gases
What are the causes of the increase in the greenhouse
effect?
Name two consequences of the increase in the
greenhouse effect

18. The hole in the ozone layer is a real hole over the
Antarctica
The hole in the ozone layer is caused by the CFCs,
chlorine atoms.
The acid rain is caused by carbon dioxide and
methane
The Acid rain can be acidic rain, snow or hail
Global warming is a consequence of the acid rain
The sulphur oxides and nitrogen oxides cause the acid
rain