Note: Attempt TEN questions. All questions carry equal marks. Draw diagrams where necessary. Negative marking would be done for incorrect answers in Question Nos. 1 and 14.


1. Which of the following statements are true and which are false.

a) Cryptograms are non-flowering plants.
b) Reserve food material is usually stored as glycogen in plants.
c) Streptococcus is a gram negative bacteria
d) Spinach is a good source of vitamin K.
e) Insulin is a hormone secreted by the spleen.
f) Femur is a bone of the forearm.
g) The moon has no atmosphere.
h) Excessive burning of fossil fuels cause acid rain.
i) Twenty-first of June is the longest day of the year in the northern hemisphere.
j) Electricity is a secondary source of energy.

2. Define any FIVE of the following scientific terms.

a) Doping
b) Immunization
c) Pasteurization
d) Modulation
e) Catabolism
f) Reprocessing of reactor fuel.

3. What do you understand by the term “deforestation”? Discuss its ill-effects on the mankind.

4. Fill in the blanks.

a) The largest planet of the solar system is _________.

b) The outermost layer of the earth is called _________.

c) Newton is the unit of _________.

d) Radium was discovered by _________.

e) The memory of the computer is expressed in _________.

f) Quartz is a crystalline form of _________.

g) AIDS is caused by _________.

h) Chemical name of gypsum is _________.

i) Molten super hot material present inside a volcano is called _________.

j) Richter scale measures the severity of _________.


5. What is composition of blood? Describe six main functions of blood.

6. Write short notes (not more than 150 words) on any two of the following.

a) Semi-conductors
b) Pesticides
c) Laser.

7. Write short notes (not more than 100 words) on the ife and works of any TWO of the following scientists.

a) Ibn Al Baitar
b) Al Beruni
c) Ibn al Haitham

8. Give brief explanation of any FIVE of the following.

a) The earth bulges out at the equator.
b) The sun appears red at the sunset and sunrise.
c) Ozone layer in the upper atmosphere is necessary for our survival.
d) The sky when viewed from the moon appears completely black.
e) Australian continent has winter season when we have summer season in Pakistan.
f) Roads are bent inwards on curves.

9. Write an essay (not more than 200 words) on ‘Variation of apparent moon size’. Draw diagram to support your description.

10. Classify the following animals are reptiles, mammals, birds and fish.

a) Blue whale
b) Cobra
c) Panda
d) Ostrich
e) Penguin
f) Kiwi
g) Shark
h) Alligator
i) Dolphin
j) Tortoise.

11. Name all the organs of the excretory system of the human body. Draw a labeled diagram and explain the functions of each organ.

12. Differentiate between the following.

a) Hypoglycemia and hyperglycemia
b) Epidemic and endemic
c) Herbivores and carnivores
d) Photosynthesis and respiration
e) Pollination and fertilization

13. How do our domestic and industrial activities pollute water? Explain with reference to two important industries of Pakistan.

14. Fill in the blanks with the correct choice.

a) pH of blood is (3.4-4.4, 7.3-7.4, 9.3-9.4)

b) One of the countries through which equator passes is (Kenya, Pakistan, Malaysia)

c) Purest form of iron is (pig iron, wrought iron, cast iron)

d) Hypo is a solution of (sodium chloride, silver nitrate, sodium thiosulphate)

e) Cod liver oil contains (Vitamin K, Vitamin E,, Vitamin D)

f) Aorta is an organ of the (nervous system, circulatory system,, digestive system)

g) Planet Mars has (one, two, four) moons.

h) Bauxite is an ore of (boron, aluminium, magnesium).

i) Circular aperture which appears as a dark spot in the eye is called (iris, pupil, lens)

j) The most distant planet in the solar system is (mars, Pluto, Jupiter)

15. Match the scientists and their discoveries/inventions given in column (a) and (b)

A

Einstein
Roentgen
Charles Darwin
Chadwick
Mendel B

Neutron
Laws of heredity
X-Rays
Theory of evolution
Mass energy conversion equation