What is the primary source of energy for the Earth's atmosphere?

• Mars

• Sun

• Saturn

• Moon

Which layer of the atmosphere contains the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What percentage of the atmosphere is comprised of oxygen?

• 21%

• 95%

• 0.93%

• 0.038%

Which gas functions as a thermal insulator to stabilize Earth's temperature?

• Methane

• Argon

• Carbon Dioxide

• Oxygen

What is the main energy source for cellular respiration in animals?

• Oxygen

• Water Vapor

• Carbon Dioxide

• Argon

Which gas plays a crucial role in the greenhouse effect?

• Water Vapor

• Carbon Dioxide

• Argon

• Oxygen

What event sparked the arrival of molecular oxygen (O₂) into the atmosphere?

• The Formation of Oceans

• The Rise of Land Plants

• The Industrial Revolution

• The Great Oxygenation Event

What marked a unique chapter in Earth's atmospheric history involving human activities?

• The Great Oxygenation Event

• The Formation of Oceans

• The Rise of Land Plants

• The Anthropocene