Front

What is the role of oxygen (O2) in the Earth's atmosphere?

Back

Oxygen is released into the atmosphere by plants during photosynthesis and is essential for animals to breathe.

Front

What happens to air molecules when the temperature increases?

Back

Air molecules spread out and take up more space when the air is warm.

Front

Which gas makes up the majority of the Earth's atmosphere?

Back

Nitrogen is the most abundant gas in the Earth's atmosphere.

Front

What are the main purposes of the atmosphere?

Back

The atmosphere supports life by protecting it from harmful radiation, creates and controls weather and climate, and provides necessary gases for breathing.

Front

In which layer of the atmosphere do the Northern Lights occur?

Back

The Northern Lights occur in the thermosphere.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

Front

What is the composition of the Earth's atmosphere?

Back

The Earth's atmosphere is composed mainly of nitrogen (78%), oxygen (21%), and trace amounts of other gases.

Front

How does the atmosphere protect life on Earth?

Back

The atmosphere protects life by filtering harmful solar radiation and maintaining a stable climate.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the process by which certain gases in the atmosphere trap heat, keeping the Earth warm.

Front

What is the significance of the ozone layer?

Back

The ozone layer absorbs most of the Sun's harmful ultraviolet radiation, protecting living organisms.