Thursday, August 18, 2011


GRADE 9: Animal and Plant Nutrition

Research on the following for your portfolio:
1. What are mycoprotein?
2. Parts of a tooth. Search for a longitudinal section diagram of a tooth.
3. Research about food additives
a. What are the different types of food additives?
b. What food contains it.
c. What is the use or function of every food additive?
4. Research about the villus and its purpose in the body.
5. How do bile salts help in the digestion of fats?
6. What are the digestive juices that is secreted by the duodenum of the small intestine?
7. What is a sphincter muscle, where is it found and its function in the body?
8. What is a balanced diet? Prepare a balanced diet for one day.
9. How do digested food gets assimilated with the body?
10. How does fiber prevents constipation?
11. What is obesity? What are the risks or serious health problems that it causes?
12. What is kwashiorkor?
13. What are the limiting factors for a plant in manufacturing food?
14. What is a green house?
15. What is a biuret solution, benedict solution and iodine? How are they used?
16. Which plant has the largest leaf ever recorded?
17. How is glucose used in by plants?
18. What are the adaptations of leaves for photosynthesis?
19. What is a condensation reaction?
20. What is a hydrolictic reaction?
21. What is a gall stone and how does it affect the body?
22. How to prevent gallstones?
23. What is the difference between a fat and an oil?
24. What is Transpiration and its importance? How do big trees use it?
25. Research about humidity and its importance?
26. What is a potometer and how is it used?
27. Research about the carbon cycle.
28. What mineral salts are needed by the plants? Explain their use for the plant.
29. Research about the willow tree experiment by Joannes Baptista van Helmont.
30. How does a plant get destarched?

Monday, August 8, 2011


Research about the following:
1. The state of equilibrium in being reached in diffusion.
2. Why do plants wilt? How can wilting be controlled?
3. Explain why animal cells do n0t build up turgor pressure.
4. Tissue culture.
5. Reverse osmosis.
7. How to measure the rate of Osmosis.
8. Experiments that involves movement of water.