How did an oxygen-rich atmosphere develop from a carbon dioxide-rich atmosphere?
A. through asteroid impacts
B. through volcanic eruptions
C. through photosynthesis by cyanobacteria
Answer: C
You might also like to view...
What is(are) the reason(s) that China built the Three Gorges Dam?
A) to control river flooding B) to create a resort area C) to produce hydroelectricity D) to control river flooding and create a resort area E) to control river flooding and produce hydroelectricity
At the beginning of the numerical weather prediction process, weather observations provide the ____________________ ____________________ upon which data assimilation and the other steps of the process will proceed
Fill in the blank(s) with correct word
To create land breeze,
A. the cool air over the land rises, creating low pressure. Warm air over water sinks, creating high pressure. This creates an offshore breeze. B. the warm air over the land rises, creating low pressure. Cool air over water sinks, creating high pressure. This creates an offshore breeze. C. the cool air over the land sinks, creating high pressure. Warm air over water rises, creating low pressure. This creates an offshore breeze. D. the warm air over the land sinks, creating high pressure. Warm air over water rises, creating low pressure. This creates an offshore breeze.
The process of convection occurs in
A. liquids. B. gases. C. solids. D. fluids.