Everyday Science Paper 2012 CSS EXAM PAKISTAN

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PART II

Q2: Write briefly about two or more major achievements of each of the following two famous Muslim scientists:-
a) Abu Abdullah Mohammad Bin Musa Al Khwarizmi (05)
b) Abu Ali Al Hassan Ibn Al Hassan Al Haytham (05)

Q3:
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)

Q4:
(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)

Q5:
(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)

Q6:
(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)

Q7:
(a) Briefly explain how Photosynthesis works? (05)
(b) Briefly explain the Nitrogen Cycle in nature. (05)

Q8: (a) Differentiate between the following: (05)

• DNA
• mRNA (Messenger RNA)
• Proteins

(b) Explain how DNA, m RNA and Proteins are interrelated to each other? (05)

Q9
a) Explain what is mean by a Balanced Diet? (05)
b) Give the major function of the following micronutrients:
Vitamin A, Vitamin C, Iron, Calcium and Iodine. (05)