WorksheetsUnit test 13 G7
Total questions: 15
Worksheet time: 32mins
What is known as the atmosphere?
Name the 5 layers of the atmosphere starting from the one closest to the earth.
Some of the gases found in the atmosphere and their respective percentages are,
Oxygen - 21%
Nitrogen - 78%
Argon - less than 1%
Carbon dioxide - more than 2%
Some of the gases found in the atmosphere and their respective percentages are,
Oxygen - 21%
Nitrogen - 78%
Argon - less than 1%
Carbon dioxide - more than 2%
Which of the following are functions of the atmosphere?
Provide oxygen.
Protect the earth from harmful rays.
Maintain the hydrological cycle.
Protect the earth from meteors.
What is known as Air pollution?
What are the 2 types of substances that cause Air pollution?
State 3 adverse effects of Air pollution.
State 3 precautions that can be taken to minimise air pollution.
The special features of the troposphere are,
Lowest layer.
Has 75% of air.
Has ozone layer.
Aeroplanes travel through this layer.
The special features of the Mesosphere are,
Coldest Layer.
Air particles absorb sun rays.
Special sceneries are present.
Has ice clouds.
The special features of Thermosphere are,
Temperature is very high.
Has special sceneries.
Thinnest Layer.
International space station is situated.
What happens to the temperature and pressure if the altitude is increased?
What is known as atmospheric pressure?
What is known as altitude?
