Evolution of Earth's Atmosphere

Front

What is the main gas that makes up Earth's current atmosphere?

Back

Nitrogen

Front

This gas was in high concentrations in the early atmosphere, and later condensed to form Earth's oceans.

Back

Water vapor

Front

Which statement best describes the Earth as it was first forming?

Back

Very hot with lots of bolides impacting the surface

Front

Has the Earth's atmosphere remained constant throughout time?

Back

No

Front

Why did the first gases on the Earth escape?

Back

The gasses were light and easily escaped Earth's gravity

Front

What are the primary components of Earth's current atmosphere?

Back

Nitrogen (78%), Oxygen (21%), Argon (0.93%), Carbon Dioxide (0.04%)

Front

What role did volcanic activity play in the formation of Earth's early atmosphere?

Back

Volcanic activity released gases such as water vapor, carbon dioxide, and nitrogen.

Front

How did the presence of water vapor in the early atmosphere affect the planet?

Back

It contributed to the formation of oceans as it cooled and condensed.

Front

What is the significance of the Great Oxygenation Event?

Back

It marked a major increase in Earth's atmospheric oxygen due to photosynthetic organisms.

Front

What is the greenhouse effect?

Back

The process by which certain gases trap heat in the atmosphere, warming the planet.