6 major stages of the earth's atmospheric evolution
Storyboard Text
- The earliest Atmosphere
- During this time of evolution every single organism would die. It is just filled with hot gasses and solids that volcanoes threw!
- The Archean Eon
- Earth has know cooled down allowing water to exist! Oxygen could be found in compounds like water. The first organism : cyanobacteria grew in the oceans.
- cyanobacteria created: Sunlight(Lead to photosynthesis) Carbon Dioxide and Water
- Methane mixed with the oxygen that was created over time by the photosynthesis organism. It cleared the methane and the sky's became blue!
- Oxygen at Last
- Photosynthesis organisms created enough oxygen over 2 billion years ago
- ( 4.6 billion years ago)
- Oxygen Boom
- An increase of oxygen allowed a variety of animals to live!
- After 600 million years there was so much oxygen that allowed life on land to exist because there was enough oxygen on the outside of seawater.
- (4 - 2.5 billion years ago)
- Age of Oxygen
- Big huge forests grew! Oxygen made up 20 percent of the atmosphere.
- More variety of organisms were grown in all regions of the world!
- (2.5 billion - 400 million years ago)
- Modern Atmosphere
- (700 - 550 million years ago)
- (400 - 290 million years ago)
- The earth became cooler! The dead remains of the organisms that didn't make it became coal!
- (290 million years ago - Now)
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