Chemistry of the atmosphere

Front

What is the atmosphere?

Back

The layers of gas surrounding the Earth.

Front

What gases were present in Earth's early atmosphere?

Back

Carbon dioxide, nitrogen, and water vapour.

Front

What is the current proportion of gases in the atmosphere?

Back

Approximately 80% nitrogen, 20% oxygen, and small proportions of various other gases.

Front

How did the evolution of plants affect the atmosphere?

Back

Plants decreased carbon dioxide and increased oxygen levels.

Front

What are fossil fuels?

Back

Natural substances formed from the remains of ancient organisms, primarily coal, oil, and natural gas.

Front

What is the role of nitrogen in the atmosphere?

Back

Nitrogen is a major component of the atmosphere, making up about 80% of it, and is inert, meaning it does not readily react with other substances.

Front

What is the greenhouse effect?

Back

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

Front

What is ozone and its significance?

Back

Ozone is a molecule made of three oxygen atoms (O3) that protects life on Earth by absorbing harmful ultraviolet radiation from the sun.

Front

What is the impact of human activities on atmospheric composition?

Back

Human activities, such as burning fossil fuels, increase greenhouse gases like carbon dioxide, leading to climate change.

Front

What is the difference between renewable and non-renewable energy sources?

Back

Renewable energy sources can be replenished naturally (e.g., solar, wind), while non-renewable sources (e.g., fossil fuels) are finite and will eventually deplete.