Nitrogen Cycle N2.

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Nitrogen Cycle Ch.2.2.

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Presentation transcript:

Nitrogen Cycle N2

forms of nitrogen N2 – gas NH3 – ammonia (activity - smell it) 78% of our atmosphere is made of N2 NH3 – ammonia (activity - smell it) contained in waste NO2 – TOXIC gas nitrite NO3 – Good Stuff (fertilizer bag) nitrate – in fertilizers for plants and algae; they absorb it and make proteins with it

Basic nitrogen cycle The nitrogen cycle works this way: Plant and animal wastes decompose and add nitrogen to the soil. Bacteria in the soil convert these forms of nitrogen into forms plants use. Plants use the nitrogen in the soil to grow. People and animals eat the plants, then animal and plant residues return nitrogen to the soil again, completing the cycle.

Vocabulary nitrogen-fixation de-nitrification process of how nitrogen (N2) turns into NO3 lightning, soil bacteria, bacteria in legume roots de-nitrification process of how NO3 get turned back in N2 excretion (removal of waste) nitrogen is in form of NH3 – ammonia kidney’s filter out NH3 legumes (high protein plants) nuts, peas, alfalfa, soy, tofu, protein shakes (whey)

nitrogen in humans/animals nitrogen is in all proteins meat, eggs, nuts, dairy, legumes flow of nitrogen we eat proteins (steak) we digest the steak body assimilates (makes a part of) protein NH3 (ammonia) is made and released we excrete (poo) the leftovers