Exploring Earth's Atmosphere

What is the most abundant gas in Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Argon

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

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

Approximately what percentage of the Earth's atmosphere is composed of oxygen?

• 21%

• 78%

• 1%

• 0.03%

In which layer of the atmosphere does most weather occur?

• Exosphere

• Stratosphere

• Troposphere

• Mesosphere

What is the primary component of the stratosphere that absorbs ultraviolet radiation?

• Carbon Dioxide

• Ozone

• Nitrogen

• Water Vapour

Which layer of the atmosphere contains the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is the approximate height of the troposphere above sea level?

• 5 miles

• 10 miles

• 15 miles

• 20 miles

Which gas is a greenhouse gas found in the Earth's atmosphere?

• Argon

• Helium

• Carbon Dioxide

• Neon

What is the coldest layer of the Earth's atmosphere?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

Which layer of the atmosphere is known for having the highest temperatures?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere