General Science & Ability 2012

2. Write briefly about two or more major achievements of each of the following two famous Muslim scientists: 5x 2=10

(a) Abu Abdullah Mohammad Bin Musa Al Khwarizmi

(b) Abu Ali Al Hassan ibn Al Hassan Al Haytham

3. (a) List four or more physical characteristics of the Earth. (05)

(b) Briefly explain how Seasons and Ocean Tides are produced on the Earth? (05)

4. (a) Very briefly explain the difference between Earthquakes, Volcanic

 eruptions, Floods and Tsunamis. (05)

(b) Briefly explain the difference between Sedimentary and Metamorphic rocks. (05)

5. (a) Very briefly explain the difference between an Insulator, a Conductor, a

 Semiconductor and a Superconductor. (05)

(b) Briefly explain the difference between a Laser and a Photovoltaic Cell. (05)

6. (a) Briefly explain the difference between an Antibiotic, an Antiviral Drug, a

 Pesticide and a Vaccine. (05)

(b) List any two of the three things that the MMR vaccine protects against. List

 any two other vaccines given to children. (05)

7. (a) Briefly explain how Photosynthesis works. (05)

(b) Briefly explain the Nitrogen Cycle in nature. (05)

8. (a) Differentiate between the following: (05)

Deoxyribonucleic Acids (DNA)

Messenger Ribonucleic Acids (mRNA)

Proteins

(b) Explain how DNA, mRNA and Proteins are interrelated to each other. (05)

9. (a) Explain what is meant by a balanced diet? (05)

(b) Give the major function of the following micronutrients: (05)

Vitamin A

Vitamin C

Iron

Calcium

Iodine