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Old Tuesday, May 26, 2009
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Default Eds - 2006.

Every Day Science Paper - 2006
Partial Solution



Q.1. Write short notes on only TWO of the following: (5 each)


(a) Magnetic Resonance Imaging
(b) Tidal Energy
(c) Supersonics

Q.2. What is Pollen Allergy? What preventive measures are to be taken to avoid it? (4, 6)

Q.3 Name. (1 each)

1) The alloy consisting of metals copper, zinc and nickel.
2) The instrument specially designed for recording earthquake waves, (Seismograph)
3) The electrical device which converts sound energy into electrical energy. (Microphone)
4) The ore of mercury metal. (Cinnabar)
5) The device with which variation of blood flow can be heard. (Sphygmomanometer)( stethoscope)
6) The element, which is abundantly present in the human body. (Hydrogen)
7) The scientist who discovered penicillin. (Sir Alexander Fleming)
8) The astronaut who first landed on the surface of the moon. (Neil Armstrong)
9) The desert mammal, which does not drink water. (Camel)
10) The mode of heat transfer from the sun to the earth. (Radiation)


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


(a) Plaster of Paris:


Compound of Calcium.
When hydrated, the form is rigid.
Blessing for broken bones.
Also used for architecture designing(Model designing), Sculpures and for filling purposes in different areas.

(b) Theodolite

(c) Bird Flu :

A viral disease of birds.
It is not only effective in birds,but generally is, some viruseshave a strong tendency for mutations. the people who work at poultry farms and shops should be innoculated.
Recent attack in Pakistan
Preventive measures

(d) Gene:

A thread like nuclear structure in not only the nucleus, it is also found in the prokaryotic cells and viruses, the of a living cell
physiological traits determinant.
Some think that it is also reponsible character determination, in humans.

(e) Thermistor:

A type of an electrical device/A semiconductor, which regulates the current flow under the influence of heat.
Used in sensitive heat measuring/operative devices e.g thermocouples/ers

(f) Thermostat:

Thermo= Heat, Stat= Statically stable
Its a thermo-electrical device.
works on the principle of thermal expansion.
Used as a temperature regulator in home appliances like refrigerators, ac,and iron.
(g) Pedometer

Q.5. Which physical quantities are measured by the following units? (1 each)

(a) Foot-Pound (Energy)

(b) Torr (Pressure)

(c) Slug (Mass)

(d) Guass (Magnetism)

(e) Acre Foot (Volume of water)

(f) Becquerel (X-ray)

(g) Erg (Energy)

(h) Dyne (Force)

(i) Gilbert (Magneto motive force)

(j) Dioptre (Lens optical power)


Q.6. What is the difference between Dam and Barrage? What benefits are obtained by constructing a big dam? (2, 8)

Ans:A dam is a storage of water, while a barrage is made to increase the water depth.

Benefits of Dams:

Leverage to agriculture, by making use of the rain water also.
Ensures regulated flow in the streams. So is an agricultural blessing.
Electricity Production is cheaper for a big dam.
By the constructoin of big dams, we get an employment channel for our talented Pakistanis.

Q.7. Which of the following statements are True and which are False: (1 each)


1) Pitch of the dog sound is greater than the pitch of the cat sound.
False, because pitch is the ear response to a sound.

2) Ultraviolet light is visible but infrared light is not visible.

False, both are invisible

3) Earthquakes are the lamps illuminating the structure of the earth’s exterior.
False


4) Electricity does not move through the wire but through a field around the wire.
False, it moves through the wire and creates a field around the wire.

5) A guava contains more vitamin C than an orange. True

6) Sound travels faster in iron than in air.
True, the molecules of a metal are closely packed, hence the density is higher

7) Wheat Bridge is the name of an electrical circuit.
False, the correct name for it is wheatstone bridge


8) Morphine can cause constipation and lowering of blood pressure. True

9) A concave lens is used for the correction of the Hyperphobia.
False, since no lens is used so far to cure a mental disease.

10) The nucleic acids are responsible for proteins synthesis in the human body. True


Q.8. Differentiate between the following pairs: (2 each)


(a) Telemeter and Multimeter:

Telemeter is used to convey the physical statistics to a distance, while a multimeter is a complex device, having a potentiometer and ammeter.

(b) Perimeter and Altimeter

Perimeter is a conceptual term, while the altimeter is a device, for measuring the altitudes.

(c) Periscope and Microscope

In microscope, the channel of light waves is straigt, while in a periscope, it is bended by the use of a mirror o a prism.

(d) Nucleon and Photon

Nucleon is a sub-nuclear particle, while a photon is n energy packet.

(e) Cusec and Comet

Cusec is a measure of flow, while comet is an object.


Q.9. Fill in the blanks: (1 each)


1) The branch of zoology, which deals with the study of insects is called entomology.

2) The disease beriberi is caused by the deficiency of Vitamin B1 (Thiamine).

3) Oil rises in a wick of oil lamp because of a property of matter, called capillary action.

4) The production of generally identical reproduction is called as Cloning.

5) Jupiter is the fastest planet of the solar system.

6) Mercury metal is 13.5 times heavier than water.

7) Relative density of milk is measured by an instrument known as lactometer.

8) The temperature of a human body is measured by an instrument known as thermometer.

9) Gold and silver are known as coinage metals.

10) The amount of ozone in the atmosphere is expressed in ppm. (4, 6)


Q.11. Give scientific reasons of the following: (2 each)


a) Why do some people snore?

In unconscious sleep, the tongue droops back due to muscular relaxation.
The tongue comes in the way of wir channel and flutters and hits the pallete.

b) Why do we sometimes sleep walk?

1- Sometimes our unconscious mind takes over.
2- The unconscious is derived by the conscious, that’s why we have fewer accidents.

c) Climber bends forward while climbing a mountain.

1- Drops his weight forward and uses the gravity effect to get a pull forwards.
2- The weight on the limbs is also lessened, so they get tired a little late then otherwise.

d) The manhole covers are generally round.

1- Because generally, the drain pipes are round and it is easy to connect through them in this way.
2- The weight is distributed at every angle evenly, So it is easy to lift them off from any corner.

e) Roads are bent inwards on curves.

1- The centrifugal force experienced by the vehicle is lowered by the raised end, so the vehicle doesn’t skit or goes off from the road.
2- The centripetal force is supplemented by the gravitaional forces from below.

Q.12. What are vitamins and minerals? Which vitamins and minerals play major role in the development of bones? (4, 6)


Minerals:

These are the ground matters, naturally occurring abundantly in the non-livings also.Examples are sodium, potassium, calcium, phosphorous, iron, sulphur and molybdenum etc.

Vitamins:

These are chemical compounds which are synthesized naturally by living cells. They are vital for physical functions, but are not primarily required for the basic function of life like metabolism including both, the catabolism and anabolism.

b) For bones, calcium is the major component along with the phosphorous. While the absorption of these is vitalized by the vitamin D.


Q.13. what do the following scientific abbreviations stand for? (1 each)


(1) CRO-CRO - Cathode rays oscillator
(2) SARS - Severe Acute respiratory syndrome
(3) BOT - Built operate transfer
(4) AMU - Atomic mass unit
(5) EMF - Electromotive force
(6) ADH - Anti diuretic harmome
(7) STP - Standard Temperature Pressure
(8) GeV - Giga Electron Volt
(9) NTP - Normal Temperature Pressure OR Network Time Protocol

(10) CRT - Cathode ray tube

Q.14. Compare the columns A and B and write the correct answer from the column B corresponding to the column A (serial wise) in column C. (1 each)

Column A--- Column ----B -----Column C

Answers:

(1) Geiger Muller Counter Semi Conductor (1) Radioactivity
(2) Newton Magnet (2) Gravitation
(3) Addison Electricity (3) Electricity
(4) Bardeen and Brattin Radioactivity (4) Semiconductor
(5) Weber Fehner’s Law E.M Induction (5) Non-conductor
(6) Benjamin Franklin Lightening Conductor (6) Lightening Conductor
(7) Decibel Gravitation (7) Sound
(8) Dr. Gilbert Water (8) Magnet
(9) Henry Cavendish Sound (9) Water
(10) Faraday Non-conductor (10) E.M. Induction



Q.15. Choose the best choice in the following statements:


1) One of the countries through which equator passes is:

(a) Kenya
(b) Malaysia
(c) Malta
(d) Pakistan

2) Copper can be converted into gold by:

(a) Artificial radioactivity
(b) heating
(c) Electroplating
(d) Chemical reaction

3) The three elements needed for healthy growth of plants are:

(a) N, P, K
(b) N, C, P
(c) N, K,
(d) N, S, P

4) Clocks, which moves with the velocities compareable with the velocity of light, run:


(a) fast
(b) slow
(c) equal to the velocity of light
(d) with zero velocity

5) Max Planck received the noble prize in Physics in 1918 for his discovery of:

(a) electron
(b) energy quanta
(c) photon
(d) positron

6) Bronze medal is made up of metals:

(a) (copper,nickel)
(b) (copper, tin)
(c) (copper, silver)
(d) (copper, zinc)

7) Addison’s disease is caused by the excessive secretion of:

(a) Antiduretic Harmone
(b) Luteinising Harmone
(c) Melanophore stimulating Harmone
(d) Adrenocorticotrophic Harmone

8) Development of calf muscles in ladies who wear high heels is a common example of:

(a) Natural Selection
(b) inheritance of acquired character
(c) Use and disuse of organ
(d) Artificial selection

9) Margalla Hill is a branch of:

(a) Karakorum range
(b) Hindukash range
(c) Himalaya range
(d) Nanga Parbat range

10) Humming bird belongs to a category called:

(a) Ectotherm
(b) Endotherm
(c) Exotherm
(d) Heterotherm.
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Last edited by Xeric; Tuesday, May 26, 2009 at 04:38 PM.
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