Which gas is most abundant in Earth's atmosphere?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Argon

What is the primary cause of the greenhouse effect?

• Water vapor

• Ozone layer

• Carbon dioxide

• Nitrogen

Which layer of the atmosphere contains the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is a major consequence of climate warming?

• Increased snowfall

• Rising sea levels

• Decreased temperatures

• More stable weather patterns

Which of the following is considered an environmental hazard?

• Solar eclipse

• Earthquake

• Rainbow

• Full moon

What is the most abundant gas in the Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Argon

Which gas makes up approximately 21% of the Earth's atmosphere?

• Nitrogen

• Oxygen

• Carbon Dioxide

• Helium

What percentage of the Earth's atmosphere is composed of Argon?

• 0.93%

• 1.0%

• 0.03%

• 2.0%

Which gas makes up the largest percentage of the Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Argon

What percentage of the atmosphere is composed of oxygen?

• 78%

• 21%

• 0.04%

• 0.93%