Exploring Air and Atmosphere

What is the primary component of air by volume?

• Argon

• Carbon Dioxide

• Oxygen

• Nitrogen

What role does carbon dioxide play in the atmosphere?

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

• Carbon dioxide acts as a greenhouse gas, regulates temperature, and is vital for photosynthesis.

• Carbon dioxide is a pollutant that has no impact on climate.

• Carbon dioxide cools the Earth's surface by reflecting sunlight.

Which layer of the atmosphere is closest to Earth?

• Mesosphere

• Troposphere

• Stratosphere

• Thermosphere

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

• The function of the ozone layer in the stratosphere is to absorb harmful ultraviolet radiation from the sun.

• To provide oxygen for breathing.

• To regulate global temperatures.

• To trap carbon dioxide in the atmosphere.

In which atmospheric layer do meteoroids burn up?

• Stratosphere

• Troposphere

• Thermosphere

• Mesosphere

What phenomenon occurs in the thermosphere?

• Volcanic eruptions

• Auroras (Northern and Southern Lights)

• Meteor showers

• Tornadoes

What is the outermost layer of the atmosphere called?

• exosphere

• mesosphere

• troposphere

• stratosphere

Why is air essential for life on Earth?

• Air is essential for life because it provides oxygen for respiration and helps regulate the Earth's climate.

• Air is crucial for life because it acts as a barrier against harmful radiation.

• Air is essential for life because it provides carbon dioxide for photosynthesis.

• Air is necessary for life as it contains nutrients for plant growth.