1. Lesson 4 Nutrient Cycling

2. What you should be doing between lessons 1.Completing the task given in the lesson and if required, saving in the pupil folder or submitting to Mrs McDougall Welch. 2.Making notes and using your own study techniques to LEARN the work of the lesson. This may involve completing extra Scholar activities or producing mind maps, flashcards, summary notes. 3.Making a note of anything that you have tried to understand but cannot. You should be doing at least 1 hour of work for every hour of lessons!

3. Carbon cycle carbon dioxide in the air photosynthesis consumers respiration Burning fuels producers detritus decay

4. Nitrogen in the air NITRATES Protein in plants Protein in animals Nitrogen in dead bodies and wastes eating excretion and death Decomposition by bacteria Absorption by roots Nitrogen Fixing by bacteria Denitrification by bacteria The nitrogen cycle

5. Protein in plants Protein in animals Nitrogen in dead bodies and wastes eating excretion and death Ammonification by bacteria and fungi Nitrification by bacteria Absorption by roots Decomposition And nitrogen cycle NitrateNitriteAmmonia Nitrobacter Nitrosomonas Nitrococcus Assimilation Nitrate gets used to make compounds in plants

6. Nitrogen in the air Nitrogen Fixing by bacteria (anaerobic) Denitrification by bacteria (anaerobic) Nitrogen fixing and denitrification Nitrate Free living e.g. cyanobacter Symbiotic e.g. Rhizobium N-fixing requires the enzyme nitrogenase

7. Carbon cycle carbon dioxide in the air photosynthesis consumers respiration Burning fuels producers detritus decay

8. Task Read pages 10 – 13 in the Student Monograph. Also read the box on pages 24/25. Read the Chapter Nutrient Cycling in the Scholar Book. 1.Produce a poster detailing the nitrogen cycle. This poster should include the chemical reactions and the names of the bacteria and processes involved. Include as much detail as possible. You may need to do a rough draft of this first. Include the information on pages 24/25. 2.Repeat for the Carbon Cycle and the Phosphorus Cycle. These are simpler and will be less involved than the Nitrogen Cycle.