Directions: Use the information provided and your knowledge of Earth and Space Sciences to answer the following questions. Show all work where necessary.
Directions: Use the information provided and your knowledge of Earth and Space Sciences to answer the following questions. Show all work where necessary.
Source:
https://www.palaeocast.com/episode-16-multicellularity-in-cyanobacteria/
Source: https://www.science.org/content/article/totally-new-idea-suggests-longer-days-early-earth-set-stage-complex-life
Explain how the evolution of cyanobacteria influenced the amount of oxygen in Earth’s atmosphere.
What was one major consequence of increasing oxygen levels in Earth’s early atmosphere?
Using the data from Figure 2, describe the relationship between oxygen concentration and day length over Earth’s history.
Explain how longer day lengths may have affected the productivity of early photosynthetic organisms.
What event is most closely associated with the sharp rise in oxygen levels about 2.4 billion years ago?
How did the increase in atmospheric oxygen influence the evolution of life on Earth?
Based on Figure 1, cyanobacteria first appeared before oxygen levels significantly increased. Explain why it took time for oxygen to accumulate in the atmosphere.
Describe one piece of geological or chemical evidence scientists use to support the timeline of increasing oxygen levels on early Earth.