They have two parts like the two wheels of a "bicycle".
Their steps always form a long ring, like a snake biting its tail.
The nutrients always get cycled and recycled through the many paths of the system.
The atmospheres receives too much carbon and it traps more heat.
A water body is damaged by excess nutrients like nitrogen.
A piece of land is over fertilized.
A water body is destroyed by excess nutrients like nitrogen.
Excess CO2 causes too much heat to be trapped in the earth's atmosphere.
A greenhouse plant receives too much fertilizer.
A. Photosynthesis turns CO2 into sugar
B. Respiration turns sugar into CO2
C. Animal waste can be converted by bacteria to form nitrates (NO3).
D. Nitrogen-fixing bacteria change nitrogen in the air (N2) to nitrates (NO3) for use.
Nitrogen fixing bacteria change atmospheric nitrogen gas to nitrates.
Respiration turns sugar (C6H12O6) into CO2.
Eutrophication results from excess fertilizer.
Photosynthesis turns CO2 into sugar (C6H12O6).
To make rain, sleet, and snow
To make proteins
To make living thing