cycles of matter

Biogeochemical processes

Human activities

Photosynthesis

Respiration

Fossil fuels from the ground provide energy in the form of carbon to the factory.

Carbon in the form of dioxide is removed from the atmosphere, since plants perform cell respiration.

Plants and animals die and then decomposers, break down dead organisms adding carbon to the soil.

Carbon in the form of dioxide is removed from the atmosphere, since plants perform photosynthesis.

nitrates intro nitrogen gas

ammonia into proteins

molecular nitrogen gas into ammonia into nitrites and nitrates

nitrites into nitrates

It helps in the formation of ammonia from nitrogen gas

It aids in the conversion of ammonia into nitrates

It releases nitrogen gas back into the atmosphere from nitrates

It increases the nitrogen content available to plants

It helps form important molecules like DNA and RNA

It is a source of energy

It aids in photosynthesis

It is a building block of proteins

Moves through the food web and returns to the soil during decomposition.

Phosphorus leaches into groundwater from the soil and is locked in sediments.

Both mining and agriculture add phosphorus into the environment.

All of the above.

They have no significant impact

They decrease the amount of phosphorus in the soil

They increase the rate of phosphorus cycling

They can lead to an oversupply of phosphorus in water bodies

Decrease in aquatic plant growth

Increase in aquatic plant growth leading to eutrophication

No significant change in the lake's ecosystem

Immediate toxicity to aquatic animals