Atmosphere

_______ Percent of nitrogen is composed in Atmosphere

• 21%

• 78%

• 34%

• 89%

Name last two layers

Region at about 500km above the Earth's surface is called !?

• Ozone layer

• Troposphere

• Exosphere

• None of the above

Ozone in the stratosphere is known as the Ozone layer

• True

• False

What are causes of air pollution ?

• Coughing

• Headache

• Dizziness

• All of the above

Which does not spread pollution

• Overusage of vehicles

• Burning poly waste

• Coal fuelled power plants

• None of the above

Identify the way practiced to control Air pollution

• Deforestation

• Afforestation

• Carpooling

• None of the above