The Structure Of The Atmosphere

Question 1

Which gases comprise the atmosphere?

Answer 1

• Nitrogen (78%)
• Oxygen (21%)
• Water vapour (0.4%)
• Argon (0.93%)
• Carbon dioxide (0.03%)

Question 2

Name the 4 layers of the atmosphere in order

Answer 2

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere

Question 3

Outline the troposphere

Answer 3

• 0 to 10,000km in altitude
• Temp decreases 6.4°C every km
• Layer that contains our weather

Question 4

Outline the stratosphere

Answer 4

• 10,000 to 50,000km in altitude

- Temp increases rapidly to 0°C due to presence of ozone, which absorbs UV

Question 5

Outline the mesosphere

Answer 5

• 50,000 to 90,000km in altitude

- UV rays pass straight through, causing temp to drop

Question 6

Outline the thermosphere

Answer 6

• 90,000 to 120,000km in altitude

- Temp increases rapidly due to atomic oxygen