4. Air page 3

Which layer of the atmosphere is closest to the earth's surface?

• Stratosphere
• Thermosphere
• Troposphere
• Mesosphere

In which layer of the atmosphere do almost all weather phenomena like rainfall and hailstorm occur?

• Stratosphere
• Troposphere
• Mesosphere
• Exosphere

What is the primary function of the ozone layer in the stratosphere?

• To trap heat from the sun
• To absorb harmful sun rays
• To create ideal flying conditions
• To regulate weather patterns

In which layer of the atmosphere do meteorites burn up when entering from space?

• Stratosphere
• Troposphere
• Thermosphere
• Mesosphere

What is the average height of the troposphere?

• 50 km
• 13 km
• 80 km
• 100 km

Which layer of the atmosphere is almost free from clouds and is ideal for flying airplanes?

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere

What is the outermost layer of the atmosphere called?

• Stratosphere
• Thermosphere
• Troposphere
• Exosphere

In which layer of the atmosphere does the temperature rise rapidly with increasing height?

• Troposphere
• Stratosphere
• Thermosphere
• Mesosphere

What is the primary gas found in the ozone layer of the stratosphere?

• Oxygen
• Carbon dioxide
• Ozone
• Nitrogen

Which layer of the atmosphere contains the ionosphere and extends very high?

• Stratosphere
• Mesosphere
• Exosphere
• Thermosphere