Nitrogen Cycle Using the wordbank below, fill in the boxes to describe the players in the nitrogen cycle N₂ atmospheric nitrogen 2 NH mony Lou 2016 ammonium ion GA I decomposition by fungi and bacteria 2. lightning 3. most plant uptake 4. dead organisms and waste trogen is found in abundance in the mosphere as N2, but this gas is not ologically available to organisms until is "fixed" into ammonium ions. rogen available to organisms to use often the limiting ingredient, the iting factor that determines plant oductivity in an ecosystem. N in organic compounds found in plants, animals, and other organisms NO2 nitrite ion NO3 nitrate ion A 5. nitrogen fixing bacteria in legume root nodules 6. nitrogen fixing bacteria in soll ON THE 7. denitrifying bacteria 8. ammonium oxidizing bacteria 9 nitrite oxidizing bacteria Much of the nitrogen that humans add to the soil ends up in our stream rivers, and the ocean An increase of nitrogen in the waters can change pH of the water, it can cause lower levels of oxygen in the water, and it affect which organisms live there. II. One consequence of increased aquatic nitrogen is toxic algal blooms. is an algal bloom? When farmers add fertilizer to soil, at are they normally adding to the What form(s) of nitrogen? (look 12. How do algal blooms affect other life in the surrounding area? p if you don't know!)

Human Anatomy & Physiology (11th Edition)
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Chapter1: The Human Body: An Orientation
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### Nitrogen Cycle Educational Worksheet

**Name:** _______________  
**Class:** _______________  
**Date:** _______________

---

#### Nitrogen Cycle

**Instructions:** Using the word bank below, fill in the boxes to describe the players in the nitrogen cycle.

##### Diagram Description
The diagram outlines the nitrogen cycle, showing the transformation of nitrogen through various forms and cycles. It includes stages such as decomposition, plant uptake, and nitrogen fixation. There are several arrows indicating the flow and conversion processes involving atmospheric nitrogen (N₂), ammonium ion (NH₄⁺), nitrite ion (NO₂⁻), and nitrate ion (NO₃⁻).

---

**Word Bank:**  
1. decomposition by fungi and bacteria  
2. lightning  
3. most plant uptake  
4. dead organisms and waste  
5. nitrogen fixing bacteria in legume root nodules  
6. nitrogen fixing bacteria in soil  
7. denitrifying bacteria  
8. ammonium oxidizing bacteria  
9. nitrite oxidizing bacteria  

---

Nitrogen is found in abundance in the atmosphere as N₂, but this gas is not biologically available to organisms until it is "fixed" into ammonium ions. Nitrogen available to organisms to use is often the limiting ingredient, the limiting factor that determines plant productivity in an ecosystem.

**10. When farmers add fertilizer to soil, what are they normally adding to the soil? What form(s) of nitrogen? (look it up if you don’t know!)**

*Answer:* ___________________________________________________

Much of the nitrogen that humans add to the soil ends up in our streams, rivers, and the ocean. An increase of nitrogen in the waters can change the pH of the water, it can cause lower levels of oxygen in the water, and it can affect which organisms live there.

**11. One consequence of increased aquatic nitrogen is toxic algal blooms. What is an algal bloom?**

*Answer:* ___________________________________________________

**12. How do algal blooms affect other life in the surrounding area?**

*Answer:* ___________________________________________________

---

*(C) Bethany Lau 2016*

---
Transcribed Image Text:--- ### Nitrogen Cycle Educational Worksheet **Name:** _______________ **Class:** _______________ **Date:** _______________ --- #### Nitrogen Cycle **Instructions:** Using the word bank below, fill in the boxes to describe the players in the nitrogen cycle. ##### Diagram Description The diagram outlines the nitrogen cycle, showing the transformation of nitrogen through various forms and cycles. It includes stages such as decomposition, plant uptake, and nitrogen fixation. There are several arrows indicating the flow and conversion processes involving atmospheric nitrogen (N₂), ammonium ion (NH₄⁺), nitrite ion (NO₂⁻), and nitrate ion (NO₃⁻). --- **Word Bank:** 1. decomposition by fungi and bacteria 2. lightning 3. most plant uptake 4. dead organisms and waste 5. nitrogen fixing bacteria in legume root nodules 6. nitrogen fixing bacteria in soil 7. denitrifying bacteria 8. ammonium oxidizing bacteria 9. nitrite oxidizing bacteria --- Nitrogen is found in abundance in the atmosphere as N₂, but this gas is not biologically available to organisms until it is "fixed" into ammonium ions. Nitrogen available to organisms to use is often the limiting ingredient, the limiting factor that determines plant productivity in an ecosystem. **10. When farmers add fertilizer to soil, what are they normally adding to the soil? What form(s) of nitrogen? (look it up if you don’t know!)** *Answer:* ___________________________________________________ Much of the nitrogen that humans add to the soil ends up in our streams, rivers, and the ocean. An increase of nitrogen in the waters can change the pH of the water, it can cause lower levels of oxygen in the water, and it can affect which organisms live there. **11. One consequence of increased aquatic nitrogen is toxic algal blooms. What is an algal bloom?** *Answer:* ___________________________________________________ **12. How do algal blooms affect other life in the surrounding area?** *Answer:* ___________________________________________________ --- *(C) Bethany Lau 2016* ---
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