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Old Sunday, March 15, 2009
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1. Which of the following statements are true and which are false.
a) Bacteria are parasites(t)
b) Ruby is an Oxide of Aluminum(t)
c) In the Australian continent, days are longer than nights in June.(f)
d) Gypsum is hydrated calcium carbonate chemically.(f)
e) Twenty-three moons revolve around Saturn(f)
f) Pluto is the coldest planet(t- provided if u consider pluto a planet)
g) Chromite ore contains chromium oxide(t)
h) Mica is a nonconductor of electricity.(t)
i) Sun is the biggest star in the universe.(f)
j) The earth completes one rotation about its axis in 365.25 days.(f)

4. Fill in the blanks
(i) The capacity to do work is called _________.(energy)
(ii) The energy possessed by a body die to its position is called _________.(potential energy)
(iii) Kitab al-Manazir is a publication by a famous Muslim scientist about _________.(optical)
(iv) _________ usually lies in the centre of an animal cell.(nucleus)
(v) Calcium and _________ are the essential elements of bones.(phosphorus)
(vi) Proteins are formed by combination of _________.(amino acids)
(vii) Rainwater dissolves sulphur dioxide to form _________(sulphuric acid)
(viii) The set of instructions given to a computer is called _________.(software)
(ix) Chemicals such as penicillin which set on _________ are called antibiotics.(cant undestand the question)
(x) Comet Shoemaker Levy 9 hit the planet _________ in July this year.(jupiter(collision took place in july 1994))

7. Give brief answers for any five of the following
(i) Name the two proteins found in milk.(lactin and casein)
(ii) What organ of human body controls the amount of water and salt in blood?(kidneys)
(iii) Drugs are classified into five major groups. Define any two.
(iv) How do chromosomes in a male and female (enter) in a human body?(cant understand this one either)
(v) Which two gases do you exhale more than you inhale?(carbon dioxide and oxygen)
(vi) Name any two glands which secretes hormones in human body(thyroid and pancreas)
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