Class 7 Ls Atmosphere

What gas makes up 21% of Earth's atmosphere ?

• Hydrogen

• Nitrogen

• Oxygen

• Sulphur dioxide

Which layer of the atmosphere contains Ozone ?

• Mesosphere

• Stratosphere

• Troposphere

• Ionosphere

The layer where most meteorites vaporise ?

• Mesosphere

• Troposphere

• Stratosphere

• Exosphere

Most abundant gas in the Earth's atmosphere.

• Oxygen

• Hydrogen

• Nitrogen

• Ozone

Temperature in the Stratosphere decreases as the altitude increases.

• True

• False

• not sure

• 50% true

Thermosphere is also called-

• Mesosphere

• Exosphere

• Terrosphere

• Ionosphere

How high above the Earth's surface does the Stratosphere go ?

• 100 Kms

• 120 Kms

• 50 Kms

• 40 Kms

Which is the hottest layer of the atmosphere ?

• Thermosphere

• Mesosphere

• Exosphere

• Stratosphere

This layer in the atmosphere protects us from the harmful UV rays

• Oxygen

• Ozone

• Bromine

• Hydrogen

Where do satellites orbit ?

• Mesosphere

• Thermosphere

• Ionosphere

• Exosphere