GRADE 9 IGCSE

Research the following:

¡Singapore opened Asia’s largest water desalination plant on Sept. 13, 2005. Water desalination involves reverse osmosis.

¡What is reverse Osmosis?

¡What are the sources of drinking water in Singapore and Indonesia?

¡How much water is consumed in Singapore per day? Indonesia per day?

¡Why does Singapore needs to desalinate water?

GRADE 9 IGCSE

RESEARCH ON THE FOLLOWING:

1. What is food? explain its use in the body of an organism.

2. What is meant by essential and non essential amino acids? How do we get it?

3. In what way is a calorie related to a change in weight?

4. What vitamin deficiency will a pure vegetarian most likely suffer from?

5. People can survive a short time without most nutrients, but they must have water regularly. Why?

6. What is energy?

7. What is a flamingo milk?

8. How does the body control heat loss?

9. How do cholesterol lead to heart disease?

10. How is starch hydrolyzed by enzymes?

11. Explain the quality of proteins.

12. Problems of world food supply.

13. Balanced diet.

GRADE 10: RESEARCH

Research the following:

1. Explain thoughtless response through an example from an animal without brain.

2. Structure of spinal nerves.

3. Discuss Grey matters.

4. Meningitis: cause, effect and treatment.

5. Explain the knee-jerk reflex.

6. Pavlov's experiment with conditioned reflex.

7. Pupil and its size adaptation to animals.

8. Discuss tapetum.

9. Explain pupil reflex.

10. Explain stereoscopic vision.

11. Explain the near point of the eye.

12. Acute Myopia: What are the advantages and disadvantages with, wearing glasses, contact lenses or refractive surgery? What will you suggest?

13. Discuss growth and metabolic abnormalities.

14. Compare hormones that have long term effect from short term effect.

15. Compare hormonal and nervous systems.

GRADE 9 IGCSE

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?

GRADE 9 IGCSE

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.

6. IONS

7. How to measure the rate of Osmosis.

8. Experiments that involves movement of water.

GRADE 10: RESEARCH

1. Describe the human nervous system in terms of the central nervous system and the peripheral nervous system.

2. Describe the structure and function of the eye, including accommodation and pupil reflex.

3. Identify motor (effector), relay (connector)and sensory neurones and draw diagrams.

4. Describe a simple reflex arc in terms of sensory, relay and motor neurones, and a reflex action as a means of automatically and rapidly integrating and coordinating stimuli with responses.

5. Define a hormone as a chemical substance, produced by a gland and carried by the blood.

6. State the role of the hormone adrenaline in the chemical control of metabolic activity, including increasing the blood glucose concentration and pulse rate.

7. Compare nervous and hormonal control systems.

8. Give examples of situations in which adrenaline secretion increases.

9. Define and investigate geotropism and phototropism.

10. Explain the chemical control of plant growth by auxins including geotropism and phototropism in terms of auxins regulating differential growth.

11. Define and Identify, on a diagram of the skin: hairs, sweat glands, temperature receptors, blood.

12. Describe the maintenance of a constant body temperature in humans in terms of insulation and the role of temperature receptors in the skin, sweating, shivering, vasodilation and vasoconstriction of arterioles supplying skin-surface capillaries and the coordinating role of the brain. vessels and fatty tissue.in homeostasis.

12. Explain the concept of control by negative feedback.
13. Describe the control of the glucose content of the blood by the liver, and by insulin and glucagon from the pancreas.

GRADE 9 IGCSE

RESEARCH

All research should be saved first and will be submitted a

t the end of each SEMESTER inside the PORTFOLIO!!!

Research on the following:

1. History of the Cell Theory.

2. Cell parts that have membranes.

3. The function of the Cell Wall in Plants

4. The importance of ER in the synthesis of protein.

5. What are LYSOSOMES and why are they considered as "suicidal sacs"?

6. How can a Paramecium perform all cell processes?

7. Where would you find more mitochondria? Explain.

8. Comparison between an animal cell and a plant cell.

9. Prokaryotes.

10. New discoveries about CELL.

11. Relate the structure of the following to their

functions

• red blood cells – transport,

• root hair cells – absorption.