Quiz on Atmospheric Principles and Layers

What is the primary gas composition of Earth's atmosphere?

• 70% Nitrogen, 30% Oxygen, 0% Other gases

• 78% Nitrogen, 21% Oxygen, 1% Other gases

• 75.3% Nitrogen, 23.15% Oxygen, 1.55% Other gases

• 75.3% Oxygen, 23.15% Nitrogen, 1.55% Other gases

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

• Troposphere

• Thermosphere

• Mesosphere

• Stratosphere

What is the temperature lapse rate in the troposphere?

• Temperature decreases by 1.98°C for every 1000 feet

• Temperature remains constant at all altitudes

• Temperature increases by 1.98°C for every 1000 feet

• Temperature decreases by 2°C for every 1000 feet

At what altitude does the stratosphere reach its highest temperature?

• 35,000 feet

• 10,000 feet

• 20,000 feet

• 50,000 feet

What is the approximate weight of a column of air at sea level per square inch?

• 15.0 lbs

• 12.3 lbs

• 10.5 lbs

• 14.7 lbs

Which layer of the atmosphere is known as the 'cold layer'?

• Mesosphere

• Thermosphere

• Stratosphere

• Troposphere

What is the average atmospheric pressure at sea level in inches of mercury?

• 29.50 in Hg

• 28.50 in Hg

• 30.00 in Hg

• 29.92 in Hg

What is the temperature at the top of the troposphere?

• 15°C

• 0°C

• -20°C

• -56.5°C

Which layer of the atmosphere contains the ozone layer?

• Exosphere

• Stratosphere

• Troposphere

• Mesosphere

What is the main purpose of the I.C.A.N. standard atmosphere?

• To measure temperature changes

• To standardize atmospheric pressure and temperature for aviation

• To define the layers of the atmosphere

• To calculate the density of air