fixation

denitrification

nitrification

ammonification

Eutrophication occurs when an aquatic system has an overabundance of nutrients. It is most often caused by human activity like farming, maintaining golf courses and other activities that can lead to fertilizer run off.

Eutrophication occurs when an aquatic system has a lack of nutrients. It is most often caused by human activity like farming, maintaining golf courses and other activities that can lead to fertilizer run off.

Eutrophication occurs when an aquatic system has an overabundance of nutrients. It is most often caused by an excessive amount of bacteria in the soil, performing nitrogen fixation at an increased rate.

Eutrophication occurs when an aquatic system has a lack of nutrients. It is most often caused by an excessive amount of bacteria in the soil, performing nitrogen fixation at an increased rate.

True

False

in the atmosphere

in the soil

in animal waste

in living organisms

all of these

bacteria

lightning

decomposers

production of proteins

cellular respiration

energy

all of these

none of these

Decomposers help break it down into a form usable by plants.

Rain causes denitrification to break it down into plant nutrients.

It dissolves completely.

It evaporates into the air.

Synthetic fertilizers add nitrogen to the soil in a form usable by plants to help them grow, increasing agricultural production.

Synthetic fertilizers add excessive nitrogen to areas, and the runoff causes eutrophication.

Excess nitrate from synthetic fertilizers can leach out of the soil, enter streams and rivers, and ultimately make its way into our drinking water.

all of these

none of these

assimilation

organization

restoration

re-nitrification

some quantities are already usable

nitrification and denitrification

fixation

ammonification