Which layer of the atmosphere is responsible for weather phenomena?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

What is the role of the ozone layer in the stratosphere?

• It absorbs and scatters ultraviolet solar radiation.

• It regulates the Earth's temperature.

• It provides oxygen for breathing.

• It protects against meteor impacts.

What is the lowest layer of the atmosphere called?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

What is the layer of the atmosphere that is characterized by increasing temperatures with altitude?

• Stratosphere

• Troposphere

• Mesosphere

• Thermosphere

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

• Tropopause

• Stratopause

• Mesopause

• Thermopause

What is the layer above the troposphere?

• Stratosphere

• Mesosphere

• Thermosphere

• Exosphere

What is the layer of the atmosphere where meteors (shooting stars) burn up?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

In which layer of the atmosphere do airplanes typically fly?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is the significance of the thermosphere?

• It contains a small proportion of the atmosphere's overall mass and is where the auroras occur.

• It is the layer of the atmosphere where weather occurs.

• It is the coldest layer of the atmosphere.

• It is where most commercial air traffic takes place.

What is the composition of Earth's current atmosphere?

• 78% nitrogen, 21% oxygen, 0.9% argon, and 0.037% carbon dioxide

• 70% nitrogen, 25% oxygen, 3% argon, and 2% carbon dioxide

• 75% nitrogen, 20% oxygen, 4% argon, and 1% carbon dioxide

• 80% nitrogen, 15% oxygen, 4% argon, and 1% carbon dioxide