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The Nitrogen Cycle (Grade 10)

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The Nitrogen Cycle

Use the diagram of the nitrogen cycle to help answer the questions.
Nitrogen Cycle Wihtout Text Labels
1. 
                 , shown by the letter                  , drive(s) the nitrogen cycle.
  1. Bacteria; A
  2. Bacteria; H
  3. Photosynthesis; C
  4. Photosynthesis; I
2. 
Which letter sequence shows the processes of fixation, nitrification, and assimilation in that order?
  1. A, L, E
  2. A, E, L
  3. E, L, A
  4. L, E, A
3. 
Which form of nitrogen is represented by J?
  1. nitrite
  2. nitrate
  3. organic
  4. ammonia
4. 
Which shows a simplified version of the conversion of nitrogen represented by C?
  1. [math]nitrate -> nitrog en (g)[/math]
  2. [math]ammonium -> nitrite[/math]
  3. [math]nitrog en (g) -> nitrate[/math]
  4. [math]ammonium -> nitrog en (g)[/math]
5. 
Which of the plants below would be most beneficial to the process occurring at I?
  1. corn
  2. alfalfa
  3. tomato
  4. spinach
6. 
Fixation is occurring primarily at
  1. A and I
  2. L and M
  3. A and M
  4. L and I
7. 
Which best describes B's function in the nitrogen cycle?
  1. fixes atmospheric nitrogen
  2. releases nitrogen gas into the atmosphere
  3. deposits organic nitrogen into the soil
  4. deposits inorganic nitrogen into the soil
8. 
Which of the letters below best represents where the process of mineralization would happen?
  1. A
  2. C
  3. F
  4. M
9. 
The cow in the diagram gets its organic nitrogen by                         and uses it to create                        .
  1. breathing; vitamins
  2. breathing; proteins
  3. eating plants; vitamins
  4. eating plants; proteins
10. 
If the factory in the diagram is using the Haber Process, it is using an industrial method for
  1. fixation
  2. assimilation
  3. denitrification
  4. mineralization

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