Troposphere

The troposphere is the lowest and densest part of the atmosphere, reaching up to 20 km at the equator and 11 km at the poles. It contains most of the atmosphere's mass and water vapor, and is where all weather phenomena occur. Both pressure and temperature decrease with altitude.

What is the approximate altitude of the troposphere at the equator?

• 20 kilometers

• 10 kilometers

• 40 kilometers

• 30 kilometers

How much of the atmosphere's mass is contained in the troposphere?

• 60%

• 90%

• 75%

• 50%

What percentage of the atmosphere's water vapor is found in the troposphere?

• 50%

• 70%

• 97%

• 85%

Where do all weather phenomena occur?

• Mesosphere

• Stratosphere

• Exosphere

• Troposphere

What happens to pressure and temperature as altitude increases in the troposphere?

• Both decrease

• Pressure increases, temperature decreases

• Pressure decreases, temperature increases

• Both increase