View Single Post
  #18  
Old Wednesday, May 27, 2009
Xeric's Avatar
Xeric Xeric is offline
Provincial Civil Service
Medal of Appreciation: Awarded to appreciate member's contribution on forum. (Academic and professional achievements do not make you eligible for this medal) - Issue reason: PMS / PCS Award: Serving PMS / PCS (BS 17) officers are eligible only. - Issue reason: Diligent Service Medal: Awarded upon completion of 5 years of dedicated services and contribution to the community. - Issue reason:
 
Join Date: Aug 2007
Posts: 2,639
Thanks: 430
Thanked 2,335 Times in 569 Posts
Xeric is a bearer of wisdomXeric is a bearer of wisdomXeric is a bearer of wisdomXeric is a bearer of wisdomXeric is a bearer of wisdomXeric is a bearer of wisdomXeric is a bearer of wisdomXeric is a bearer of wisdomXeric is a bearer of wisdomXeric is a bearer of wisdomXeric is a bearer of wisdom
Default Eds - 2008

Every Day Science Paper - 2008
Partial Solution

PART-II (Subjective)


TIME ALLOWED: 100 MINUTES……..........……Maximum Marks: 50


NOTE:
(i) Attempt ONLY FIVE questions. All questions carry EQUAL marks.
(ii) Extra attempt of any question or any part of the attempted question will not be considered.

Q.1. Write briefly about the life and scientific contributions of the following Muslim Scientists: (5+5)

a. Muhammad bin Musa Al-Khawarizmi
b. Abu Ali Sina

Q.2. Differentiate clearly between the following pairs: (2 each)

a. Fission and Fusion:

Fission splits a massive element into fragments, releasing energy in the process. Fusion joins two light elements, forming a more massive element, and releasing energy in the process.

b. Star and Planet:

A star is a huge ball of hot glowing gases whirling in space. Our sun is a star and the only one close enough to earth for us to see its ball shape. all are made up of the same two gases, hydrogen and helium. The stars shine because atomic energy at their center makes them very hot. They shine night and day, but we see them only at night when the sky is dark.

A planet, on the other hand, is a smaller, solid body which does not shine by its own light, but rather by the light reflected from the sun. While planets shine steadily, stars seem to twinkle. This is because of the movement of layers of air between the stars and the earth.

b. Fertilization & Pollination:

Fertilization is a process in sexual reproduction that involves the union of male (sperm) and female (ovum) gametes (each with a single, haploid set of chromosomes) to produce a diploid zygote

Pollination is the process by which pollen is transferred in flowering plants, thereby enabling fertilisation and sexual reproduction.

c. Telescope & Microscepe:

A telescope is an instrument designed for the observation of remote objects by the collection of electromagnetic radiation.

A microscope is an instrument for viewing objects that are too small to be seen by the naked or unaided eye.

d. Antibiotics & Vaccination:

An antibiotic is a substance or compound that kills or inhibits the growth of bacteria. Antibiotics belong to the group of antimicrobial compounds used to treat infections caused by microorganisms, including fungi and protozoa.

Vaccination is the administration of antigenic material to produce immunity to a disease. Vaccines can prevent or ameliorate the effects of infection by a pathogen. It is considered to be the most effective and cost-effective method of preventing infectious diseases.

Q.3. a. Discuss briefly the SOLAR SYSTEM. (6)
b. How are EARTHQUAKES caused? (4)

Q.4. Write briefly (not more than four to five sentences) about any FIVE of the following: (2 each)

a. Supernova: star increasing suddenly in brightness.


b. Radioactivity: spontaneous disintegration of atomic nuclei, with the emission of usu. penetrating radiation or particles.

c. Laser: device that generates an intense beam of coherent light, or other electromagnetic radiation, in one direction. (Light Amplification by Stimulated Emission of Radiation)

d. Semiconductors: substance that in certain conditions has electrical conductivity intermediate between insulators and metals.

e. Geothermal Energy
: Geothermal power is power extracted from heat stored in the earth. This geothermal energy originates from the original formation of the planet, from radioactive decay of minerals, and from solar energy absorbed at the surface.

f. Computer Virus: self-replicating code maliciously introduced into a computer program and intended to corrupt the system or destroy data.
g. Pasteurization:

Q.5. a. What are HORMONES? Name four important hormones and describe their functions in the human body. (2+4)

b. Explain the structure and function of an ANIMAL CELL with a labeled diagram. (2+2)

Q.6. a. What are the essential nutrients of BALANCED DIET? Describe one such nutrient in detail explaining its role in the metabolism. (2+4)

b. What do the following scientific abbreviations stand for? (1/2 each)

i. PVC - Polyvinyl Chloride

ii. BCG - Bacillus Calmette-Guérin, an anti-tuberculosis vaccine.
iii. ECG - Electrocardiogram.
iv. CFC - Chlorofluorocarbon
v. LPG - Liquefied Petroleum Gas
vi. DNA - Deoxyribonucleic acid
vii. AIDS - Aquired Immune Deficiency Syndrome
viii. TNT - Trinitrotoluene
ix. EEG - Electroencephalogram

Q.7. a. Define ENERGY. Name four renewable sources of energy. How can our country come out of Energy Crisis? (1+2+3)

Energy:

In physics, energy ", is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and systems that is subject to a conservation law. Eight different forms of energy exist to explain all known natural phenomena. These forms include kinetic, potential, thermal, gravitational, sound, light, elastic, and electromagnetic energy. The forms of energy are often named after a related force.

Renewable sources of Energy:

Renewable energy sources can be replenished in a short period of time. The five renewable sources used most often are:

o Biomass - including wood and wood waste, municipal solid waste, landfill and biogas, ethanol, and biodiesel
o Water (hydropower)
o Geothermal
o Wind
o Solar

Recommendations to overcome Energy Crisis:

-New power generation and conservation projects.
-Replacement of inefficient plants.
-Reducing transmission and distribution loss.
-Construction of new Dams.
-Institutional and Administrative Improvement.
-Utilization of largest deposits of coal.
-Renewable sources of energy.
-Public Awareness.

b. Write a brief note on CERAMICS. (4)

Q.8. a. Describe very briefly the working of a CAMERA. How does it resemble in its function with that of the HUMAN EYE? (3+3)

b. What are PLASTCS? Describe briefly their characteristics and Limitations. (1+3)


Part - I (Objective Portion )

Note: Candidates were not allowed to take away the Question Paper of MCQs portion. The following MCQs are recalled by members of CSSForum.

~Japan is called:


-Land of earthquakes
-Land of rising sun
-Land of rivers

~Which of the following is used to kill rats?

-Rodenticides

~Which planet of our solar system is called as Morning star?

-Venus

~What is the diameter of the earth?

-12 756.2 kilometers

~ Opium is found in?

-Drug made from the juice of a certain poppy, used esp. as an analgesic and narcotic.

~Opium is used to make the following

-Heroine

~Which one of the following book was written by Ibn-al-haisham?

~Speed of light is?

~Which of the following energy in converted into electric in a generator?

-Chemical
-Mechanical
-Thermal

~Diamond is the refined form of

- Carbon
-Coal

12) Dry Ice is?

-Co2

~Telephone was invented by?

-Alexander Graham Bell

~Name the instrument used to measure electric current?

-Ammeter

~Ascorbic is vitamin?

-A, B, C, K

~Total number of bones in human face are?


~Name of vitamin C: Ascorbic Acid

~The sky appears blue due to: Tyndal effect

~Fat soluble vitamins

~Mixture used for welding - Chemical composition

~(which of the following is not a thermoplasic? Bakelite

~Hematite (a mineral) is the important source of? Iron

~fat soluble vitamins are? A,D,E and K.

~Bauxite is the mineral of? Aluminium.


~Abu Ali Sina, Al Biruni, Ibn Al Haitham belonged to which century - 10the
century


~Bakelite, Polyester are which type of plastics - Thermosetting plastics

~Bronze is an alloy of - Copper and tin

~which of the following is an invertebrate - Insects

~identify the animal - rudimentary wings, long bill, lives in burrows - Kiwi

~Largest organ of human body - Skin

~Vaccine for T.B - Bacille calmine gurette ( BCG )

~Power house of cell - Mitochondria
__________________
No matter how fast i run or how far i go it wont escape me, pain, misery, emptiness.

Last edited by Xeric; Wednesday, May 27, 2009 at 12:48 AM.
Reply With Quote
The Following 8 Users Say Thank You to Xeric For This Useful Post:
awaisnaveed (Friday, June 05, 2009), M Zahid Gondal (Sunday, March 10, 2013), M.Murtaza (Monday, April 05, 2010), oxon (Tuesday, November 06, 2012), pisceankhan (Sunday, August 17, 2014), sanu (Thursday, September 09, 2010), sumaira85 (Thursday, February 10, 2011)