Importance of Earth's Atmosphere

What is the main component of Earth's atmosphere?

• Nitrogen

• Oxygen

• Carbon Dioxide

• Water Vapor

Which layer of the atmosphere contains the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What does the ozone layer protect us from?

• Heat

• Radiation

• Weather

• Water Vapor

Which layer of the atmosphere protects us from meteors?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

At what altitude does the International Space Station orbit the Earth?

• 14.5 kilometers

• 50 kilometers

• 85 kilometers

• 400 kilometers

Why is the sky blue on Earth?

• Scattering of blue light

• Absorption of blue light

• Reflection of blue light

• Emission of blue light

Why is the sky black in space?

• Absence of atmosphere

• Absence of sunlight

• Absence of stars

• Absence of air molecules

What happens to air pressure as altitude increases?

• Increases

• Remains constant

• Decreases rapidly

• Decreases slowly

Why is the air thinner in the mountains?

• Less oxygen

• Less nitrogen

• Less carbon dioxide

• Less air pressure

What is the pressure at the top of Mount Everest compared to sea level?

• Equal

• 50% of sea level

• Less than 30% of sea level

• More than 70% of sea level