GCSE Chemistry - Evolution of the Atmosphere #67

The video explains the evolution of Earth's atmosphere, starting with volcanic activity that created a carbon dioxide-rich environment. Over billions of years, photosynthesis by algae and plants reduced CO2 levels and increased oxygen, enabling complex life. Carbon was sequestered in sedimentary rocks and fossil fuels, shaping today's atmosphere of mostly nitrogen and oxygen.

What gases primarily composed the early atmosphere of Earth?

How did volcanic activity contribute to the composition of the early atmosphere?

What role did algae and plants play in changing the atmosphere over billions of years?

Explain the process by which carbon dioxide was removed from the atmosphere.

What are the different types of sedimentary rocks formed from the remains of organisms?