2. Changes In The Geosphere, Atmosphere and Hydrosphere

Question 1

How does cyanobacteria affect the hydrosphere?

Answer 1

Oxygen is released in oceans as this is where cyanobacteria is present.

-Decreased carbon dioxide

Question 2

How do cyanobacteria affect the biosphere?

Answer 2

-Inputs of carbon dioxide and water are abundant (a lot).
-Oxygenic photosynthesis is very efficient.

Question 3

How do cyanobacteria affect the atmosphere?

Answer 3

-Carbon dioxide decreased
-Oxygen increased
-Ozone layer begins to form.

Question 4

How do cyanobacteria affect the geosphere?

Answer 4

-Iron oxide deposits on land occur.
-Minerals that decompose in oxygen become rare