Exploring Atmosphere and Air

What are the four main layers of the atmosphere?

• Lithosphere, Hydrosphere, Biosphere, Cryosphere

• Troposphere, Stratosphere, Exosphere, Mesosphere

• Troposphere, Stratosphere, Mesosphere, Thermosphere

• Exosphere, Ionosphere, Magnetosphere, Ozone Layer

Which layer of the atmosphere is closest to Earth?

• Stratosphere

• Troposphere

• Thermosphere

• Mesosphere

What is the primary gas found in the Earth's atmosphere?

• Helium

• Nitrogen

• Carbon Dioxide

• Oxygen

Name the layer of the atmosphere where weather occurs.

• Stratosphere

• Troposphere

• Mesosphere

• Thermosphere

What is the function of the ozone layer?

• The function of the ozone layer is to protect the Earth from harmful ultraviolet radiation.

• To create weather patterns.

• To regulate the Earth's temperature.

• To provide oxygen for living organisms.

What percentage of the atmosphere is made up of nitrogen?

• 72%

• 85%

• 78%

• 65%

Which gas is essential for human respiration?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon Dioxide

What is the uppermost layer of the atmosphere called?

• Stratosphere

• Troposphere

• Mesosphere

• Exosphere

How does the composition of air change with altitude?

• Air becomes more humid as altitude increases, altering its composition.

• The composition of air varies greatly, with more carbon dioxide at higher altitudes.

• The composition of air changes significantly, increasing in oxygen with altitude.

• The composition of air remains constant, but the density and pressure decrease with altitude.

What is the role of carbon dioxide in the atmosphere?

• Carbon dioxide is a primary source of oxygen in the atmosphere.

• Carbon dioxide helps regulate Earth's temperature and is essential for photosynthesis.

• Carbon dioxide contributes to the depletion of the ozone layer.

• Carbon dioxide is a harmful pollutant that has no natural role in the environment.