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The Nitrogen Cycle!

The Nitrogen Cycle!. Take a DEEP breath!. Most of which you just inhaled was NITROGEN! 80% of the air is made of NITROGEN Plants get nitrogen from SOIL Farmers add nitrogen to soil so plants grow larger and faster….like steroids Your body doesn’t use nitrogen from the air

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The Nitrogen Cycle!

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  1. The Nitrogen Cycle!

  2. Take a DEEP breath! • Most of which you just inhaled was NITROGEN! • 80% of the air is made of NITROGEN • Plants get nitrogen from SOIL • Farmers add nitrogen to soil so plants grow larger and faster….like steroids • Your body doesn’t use nitrogen from the air • It used nitrogen from the FOOD you eat!

  3. Nitrogen is a GAS! Nitrogen is necessary for the survival of all ECOSYSTEMS What’s an ECOSYSTEM? An environment consisting of organisms that survive there!

  4. A few terms to know….. • Bacteria: a large group of one-celled organisms • Nitrogen Fixation: converting nitrogen from the atmosphere to ammonia • Denitrification: to reduce or remove nitrogen

  5. 2 Ways Nitrogen is “Fixed” • Lightning The energy from lightning causes nitrogen and water to combine to form ammonia (NH3) and nitrates (NO3). Precipitation carries the ammonia and nitrates to the ground, where they can be taken in by plants.

  6. 2 Ways Nitrogen is “Fixed” 2. Bacteria . About 90% of nitrogen fixation is done by bacteria. Cyanobacteria convert nitrogen into ammonia Ammonia can be used by plants directly

  7. 2 Parts of the Nitrogen Cycle

  8. Part 1Nitrogen fixation Nitrogen-fixing bacteria found in the soils and in the roots of certain plants, change freenitrogen into substances that other organisms can use. OR Lightning helps nitrogen and water combine to form useful nitrogen When this part of the process is finished….

  9. Part 1 cont… Free nitrogen is converted into nitratesand ammonia. These substances can be used by plants. As the plants become food, the nitrogen can be used by animals. And then…………………..

  10. Part 1 is almost done… Just as there are nitrogen-fixing bacteria, some bacteria have the job of denitrifying the soil to keep the nitrogen in balance. These bacteria take the nitrogen compounds and return them to nitrogen gas that is released back into the atmosphere.

  11. Part 2

  12. Part 2Balancing the Nitrogen Animals eat plants containing usable nitrogen. That nitrogen returns to the soil as organic material (animal waste, decaying plants and animals) is decomposed by bacteria and other decomposers. As in the first part of the cycle, denitrifying bacteria keep the nitrogen level in the soil balanced

  13. Time To Label Our Diagrams!

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