Atmosphere and Layers

What is the composition of the atmosphere?

• 78% nitrogen, 21% oxygen, trace amounts of other gases

• 30% nitrogen, 70% oxygen

• 90% nitrogen, 10% oxygen

• 50% nitrogen, 50% oxygen

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

• Mesosphere

• Exosphere

• Stratosphere

• Troposphere

In which layer of the atmosphere do we find the ozone layer?

• mesosphere

• ionosphere

• troposphere

• stratosphere

Which layer of the atmosphere is known for containing the coldest temperatures?

• Mesosphere

• Troposphere

• Stratosphere

• Thermosphere

Where do meteors burn up in the atmosphere?

• Troposphere

• Mesosphere

• Exosphere

• Terrasphere

Which layer of the atmosphere is where the International Space Station orbits?

• Thermosphere

• Exosphere

• Troposphere

• Mesosphere

What is the outermost layer of the atmosphere called?

• Exosphere

• Troposphere

• Thermosphere

• Mesosphere

What is the main gas found in the atmosphere?

• Carbon dioxide

• Nitrogen

• Argon

• Oxygen

What is the boundary between the troposphere and the stratosphere called?

• mesopause

• troposphere-stratosphere boundary

• tropopause

• stratopause

Which layer of the atmosphere is responsible for protecting us from harmful UV radiation?

• Exosphere

• Mesosphere

• Stratosphere

• Troposphere