Composition of the Atmosphere

Front

What are the two most abundant gases in Earth's atmosphere?

Back

Nitrogen and Oxygen

Front

What is the primary gas in Earth's atmosphere?

Back

Nitrogen

Front

How did oxygen levels eventually increase in the atmosphere?

Back

Through photosynthesis by algae

Front

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

Back

Oxygen

Front

What is the approximate percentage of Nitrogen in the Earth's atmosphere?

Back

About 78%.

Front

What role do plants play in the composition of the atmosphere?

Back

Plants produce oxygen through photosynthesis.

Front

What is the significance of Argon in the atmosphere?

Back

Argon is a noble gas that makes up about 0.93% of the atmosphere.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the warming of Earth's surface due to trapped heat by greenhouse gases.

Front

What are trace gases?

Back

Trace gases are present in very small amounts in the atmosphere, such as carbon dioxide and methane.

Front

How does human activity affect atmospheric composition?

Back

Human activities, like burning fossil fuels, increase greenhouse gases and alter the atmosphere.