Monday, April 9, 2012

Grade 9 IGCSE

Research on the following:

1. Define photosynthesis
2. Explain the function of chlorophyll.
3. State the word equation for the production of simple sugars and oxygen.
4. State the balanced equation for photosynthesis in symbols.
5. Investigate the necessity for chlorophyll, light and carbon dioxide for photosynthesis, using appropriate controls.
6. Describe the intake of carbon dioxide and water by plants.
7. Investigate and state the effect of varying light intensity on the rate of photosynthesis.
8. Identify and label the cuticle, cellular and tissue structure of a dicotyledonous leaf, as seen in cross-section under the light microscope and describe the significance of the features of a leaf in terms of functions.
9. Describe the importance of:
• nitrate ions for protein synthesis,
• magnesium ions for chlorophyll synthesis.
10. Explain the effects of nitrate ion and magnesium ion deficiency on plant growth.
11. Describe the uses, and the dangers of overuse, of nitrogen-containing fertilizers.

Monday, March 26, 2012

Grade 9 IGCSE

ATTENTION: Research time for Grade 9 IGCSE will be used responsibly for the purpose of reviewing for the UNAS material. Any student not following instructions would be dealt accordingly.

NOTE : You may ask the teacher for any clarification about the previous lessons.

Grade 10 IGCSE

Research on the following:
1. Identify and describe the structure of a plant cell (palisade cell) and an animal cell (liver cell), as seen under a light microscope.
2. List and describe the characteristics of living organisms.
3. Describe the differences in structure between typical animal and plant cells and relate the structures seen under the light microscope in the plant cell and in the animal cell to their functions.
4. Relate the structure of the following to their functions
• red blood cells – transport,
• root hair cells – absorption.
5. Describe the importance of diffusion of gases and solutes and of water as a solvent.
6. Describe the importance of osmosis in the uptake of water by plants, and its effects on plant and animal tissues.
7. Describe and explain the importance of a water potential gradient in the uptake of
water by plants.
8. Investigate and describe the effect of changes in temperature and pH on enzyme activity.
9. Describe the structure of large molecules made from smaller basic units in nutrients.
10. Describe tests for:
• starch (iodine solution),
• reducing sugars (Benedict’s solution),
• protein (biuret test),
• fats (ethanol).
11. Describe the use of microorganisms in the manufacture of yoghurt.
12. Describe the deficiency symptoms for:
• vitamins (C and D only),
• mineral salts (calcium and iron only.)

Monday, February 27, 2012


1. Microscope usage
- research time will be used to have a practice.

2. Skeletal system
- Student must be able to identify different bones and its kind.
- Research using books or the internet to find it.

3. Working lung model
- you can check this or

Monday, February 20, 2012


Research on the following:

1. What is a limiting factor? Explain.
2. Enumerate and explain the different limiting factors in the environment.
3. Pinpoint the influences of the different physical factors on living things through specific examples.
4. Tolerance of an organism.
5. Explain how soil controls the distribution of plant and animals in Indonesia.
6. What is Topography and explain how it affects the distribution of plants and animals to different places?
7. Explain how humans disrupt the balance ecological balance.
8. Provide solutions to the different ecological problems you will answer in no. 7.
9. Research on the pollutants present in the Ocean.
10. What is Erosion and its effect to the habitat?

Thursday, February 16, 2012


Research on the following:
1. How is DNA organized inside the cell?
2. What are the basic units of DNA and show a DIAGRAM.
3. What is the rule in base pairing for the nitrogen-containing bases of DNA?
4. Structure of a GENE.
5. What is RNA?
6. What is genetic engineering? Usage? Issues against it? and its impact to Society?
7. Research on the life and works of Charles Darwin.
8. Research about the Galapagos Islands, its animals and plants.
9. Research about protein synthesis.
10. How is Hemophilia inherited?

Monday, February 6, 2012


Research on the following:
1. Define inheritance
2. Describe the inheritance of sex in humans
3. Define haploid nucleus and diploid nucleus
4. State that gametes are the result of meiosis.
5. Define and explain the terms:
A. genotype
B. phenotype
C. homozygous
D. heterozygous
E. chromosome
F. Allele
G. gene
6. Monhybrid cross and dihybrid cross
7. State that continuous variation is influenced by genes and
environment, resulting in a range of phenotypes between two
8. State that discontinuous variation
9. Define and explain mutation.
10. Outline the effects of ionising radiation on the rate of mutation.
11. Describe and explain variation
12. Describe the role of artificial selection in the production of varieties of
animals and plants with increased economic importance.
13. Define and explain natural selection.
14. Describe the development of strains of antibiotic resistant bacteria as
an example of natural selection.
15. Explain the importance of natural selection as a possible mechanism
for evolution.