Understanding Earth's Atmosphere and Global Warming

What percentage of Earth's atmosphere is composed of nitrogen?

• 50%

• 1%

• 78%

• 21%

Which gases are primarily responsible for maintaining Earth's temperature?

• Argon and neon

• Hydrogen and helium

• Carbon dioxide and methane

• Oxygen and nitrogen

How do greenhouse gases help keep Earth warm at night?

• By reflecting sunlight

• By absorbing heat from the Sun

• By trapping heat emitted by Earth

• By increasing oxygen levels

What has been a major cause of increased carbon dioxide levels in the past 200 years?

• Volcanic eruptions

• Deforestation

• Industrial Revolution

• Solar flares

Which of the following is a suggested method to reduce global warming?

• Increasing fossil fuel consumption

• Investing in renewable energy

• Cutting down more trees

• Using more plastic products