STARTER: Write down EVERYTHING you know about nitrogen?

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Presentation transcript:

STARTER: Write down EVERYTHING you know about nitrogen?

Environmental Systems The Nitrogen Cycle Environmental Systems

Matter cycles – Nitrogen cycle! Learning outcomes… You should all be able to: Identify the conversion of nitrogen between organic and inorganic storages. Describe the transfer and transformation of nitrogen as it moves within the ecosystem. Most of you should be able to: Construct your own flow diagram of the nitrogen cycle. Some of you might be able to: Explain these transfers and transformations.

It is one of nature’s great ironies… Nitrogen is an essential component of DNA, RNA, and proteins—the building blocks of life. Although the majority of the air we breathe is nitrogen, most living organisms are unable to use nitrogen as it exists in the atmosphere!

How does atmospheric nitrogen get changed into a form that can be used by most living organisms?

By traveling through one of the four processes in the Nitrogen Cycle! (1) Nitrogen Fixation (4) Denitrification Nitrogen Cycle (3) Nitrification (2) Ammonification

decomposition by bacteria & fungi Nitrogen in the air animal protein dead plants & animals urine & faeces ammonia nitrites nitrates plant made protein decomposition by bacteria & fungi Nitrosomonas (nitrifying bacteria) nitrates absorbed denitrifying Pseudomonas denitrificans root nodules (containing Rhizobium) nitrogen fixing plant eg pea, clover Nitrobacter Azobacter (free-living)

Your task! Imagine you are a nitrogen atom! Write a series of tweets using the template provided to illustrate your journey around the nitrogen cycle Think about : -Where you are now…. -Where you are going next…. -What forms you have taken along the way…. Don´t forget to explain any meetings with bacteria or how you have changed as a molecule! .