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Your Nitrogen Cycle sheet should now look like the one here! Tomorrow you will need these notes to complete an activity! 

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Your Nitrogen Cycle sheet should now look like the one here! Tomorrow you will need these notes to complete an activity! 

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Listen to THIS video of me talking through the padlet and explaining each picture. While you listen, or afterwards, fill in your own Nitrogen Cycle. You will not need to memorize the Nitrogen cycle, just know how to read it, why we need Nitrogen, how we (heterotrotrophs) get it, how plants (autotrophs) get it, and the role of Nitrogen Fixing Bacteria!

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So there are two loops going on here - the yellow loop between plants, animals, and decomposers. And the Green loop, between the atmosphere, Nitrogen Fixing bacteria, the soil, and Denitrifying bacteria. Plants benefit from BOTH cycles (see pink arrow) by taking NH3 out of the soil, however it got there!

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So there are two loops going on here - the yellow loop between plants, animals, and decomposers. And the Green loop, between the atmosphere, Nitrogen Fixing bacteria, the soil, and Denitrifying bacteria. Plants benefit from BOTH cycles (see pink arrow) by taking NH3 out of the soil, however it got there!

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But this is not the end of the cycle! There is another type of bacteria that is part of the Nitrogen Cycle - DENITRIFYING BACTERIA take NH3 out of the soil and make N2 out of it again - which goes back into the atmosphere. 

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But this is not the end of the cycle! There is another type of bacteria that is part of the Nitrogen Cycle - DENITRIFYING BACTERIA take NH3 out of the soil and make N2 out of it again - which goes back into the atmosphere. 

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Guess what! There are some plants (peas, legumes, clover) that have little NITROGEN FIXING bacteria HOUSES in their ROOTS!  This is a mutualistic relationship - the bacteria have a home, and the plants get a direct source of Nitrogen - like having fertilizer factories in their roots!

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Guess what! There are some plants (peas, legumes, clover) that have little NITROGEN FIXING bacteria HOUSES in their ROOTS!  This is a mutualistic relationship - the bacteria have a home, and the plants get a direct source of Nitrogen - like having fertilizer factories in their roots!

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Farmers take advantage of this by planting clover between rows of crops, or rotating crops and allowing clover to grow between rotations - the clover puts extra Nitrogen in the soil for the crop plants - reducing the need for the farmer to use synthetic fertilizers.

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So thanks to NITROGEN FIXING bacteria, there is more Nitrogen in the soil for plants to use - fertilizer via bacteria!

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So thanks to NITROGEN FIXING bacteria, there is more Nitrogen in the soil for plants to use - fertilizer via bacteria!

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Without this bacterial source, plants would not get enough Nitrogen to grow

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Nitrogen Fixing Bacteria are able to take N2, break it, and make NH3 out of it - which stays in the soil

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Free Nitrogen in the air can NOT be used by any plant or animal. The only organism that can use it is....

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Free Nitrogen in the air can NOT be used by any plant or animal. The only organism that can use it is....

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NH3 (Nitrogen in the soil) is absorbed by plants! Dead stuff becomes fertilizer - plants take the Nitrogen out of the soil and use it to make their own DNA and Proteins.

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NH3 (Nitrogen in the soil) is absorbed by plants! Dead stuff becomes fertilizer - plants take the Nitrogen out of the soil and use it to make their own DNA and Proteins.

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This is why decomposes are considered "recycles" - they break down dead stuff so that new life (plants) can use it. One day when you die, and your body decays, your body molecules will become part of a living plant - which may get eaten by a rabbit - and then your molecules will be part of the rabbit!

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When an organism dies, their body is broken down by decomposes. The decomposes use the energy in the body for their own growth and development, and leave behind the molecules that the body was made up of - including Nitrogen. Nitrogen takes the form of NH3 (ammonia) and stays in the soil

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When an organism dies, their body is broken down by decomposes. The decomposes use the energy in the body for their own growth and development, and leave behind the molecules that the body was made up of - including Nitrogen. Nitrogen takes the form of NH3 (ammonia) and stays in the soil

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Heterotrophs get the Nitrogen they need from eating! As you grow, every new cell in your body needs Nitrogen to make DNA and proteins for that cell. When you eat a plant, or another animal, you digest their body, and take the molecules you need - including Nitrogen!

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Heterotrophs get the Nitrogen they need from eating! As you grow, every new cell in your body needs Nitrogen to make DNA and proteins for that cell. When you eat a plant, or another animal, you digest their body, and take the molecules you need - including Nitrogen!

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You literally ARE what you EAT! What you eat becomes part of you!

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We will start with plants - plants have Nitrogen in their DNA and proteins - it is part of the plant!

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We will start with plants - plants have Nitrogen in their DNA and proteins - it is part of the plant!

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Did you know that the Air is made up of 75% Nitrogen? 

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Did you know that the Air is made up of 75% Nitrogen? 

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The bonds between each Nitrogen atom in N2 are SO STRONG that there is only one organism on the planet that has the ability to break them and use them...

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ALL living things must build proteins and have DNA to store their genetic code- so ALL living things need Nitrogen to grow and live and reproduce. But where does it come from? I am so glad you asked!

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ALL living things must build proteins and have DNA to store their genetic code- so ALL living things need Nitrogen to grow and live and reproduce. But where does it come from? I am so glad you asked!

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Nitrogen is also used to build all of our proteins. This is the molecular structure of a protein that would be part of your muscles. Notice all the blue Nitrogen atoms!

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Nitrogen is also used to build all of our proteins. This is the molecular structure of a protein that would be part of your muscles. Notice all the blue Nitrogen atoms!

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The Nitrogen Cycle is important because we all need Nitrogen atoms as part of the building materials for our bodies. Check out this molecule of DNA - its full of Nitrogen (blue)

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The Nitrogen Cycle is important because we all need Nitrogen atoms as part of the building materials for our bodies. Check out this molecule of DNA - its full of Nitrogen (blue)