## SLC Model Question Set 6 (Science)

Physics

1. a) State Newton’s law of gravitation. Calculate the force with which the moon pulls every kilogram of water in our rivers given that the moon is 3×105 km away from Nepal and the mass of moon is 7×1022kg. 1.5+2+1=4.5

b) Define energy crisis. Write down any two causes and a solving way of energy crisis. 0.5+2=2.5

2. a) State Archimedes’s principle. Write down any two factors on which the upthrust depend. Prove that liquid pressure (p)=hdg. 1+1+2=4

b) Study the diagram and answer the following question. 0.5+1+2=3.5

• On which principle does it work? State the principle too.
• The cross sectional area of piston A and B are 20cm2 and 0.4cm2 respectively. What force on piston B can balance the 240N force on piston A.

3. a) What is specific heat capacity? How much heat should be lost to reduce 10C temperature of unit mass of a substance? 500g sand of specific heat capacity 800J/kg C is heated from 250C to 450C. Find the answer of heat regarded for it. 1+1+2=4

b) What is power of lens? Write its SI unit. Observe the defect of vision in the diagram and answer the following question.

• What type of defect of vision is this?
• Can this defect be corrected? Illustrate with a ray diagram.

4. a) Draw an electrical circuit for connection of three dry-cells each of 1.5 volts in a parallel combination. Calculate the potential difference of the cells that are connected in series combination. Write the main two reasons for use of filament of tungsten wire in an electric bulb. 1.5+0.5+1=3

b) What is motor effect? Write any three methods for increasing the amount of electric current produced by dynamo or generator. The number of turns in primary and secondary coil of a transformer are 1000 and 500 respectively voltage. 1+1.5+2=4.5

Chemistry

5. a) State modern period law. In which group of the modern periodic table are there very active metals and very active non-metals? Clarify the relation between the size of the atoms of these metals and non-metals with their chemical reactivity.

b) Draw the labeled diagram to show the laboratory preparation of ammonia gas. What is dry ice? Write the structural formula of diethyl ether. 2+1+0.5=3.5

6. a) Define acid with an example. Name the two ores of copper. Write the balanced chemical equation for the reaction between iron and dilute sulpheric acid. 1+1+2=4

b) Name the raw materials that are necessary for making soap. What do you mean by insecticides? Why is their use discouraged? Give any three reasons. 1+1+1.5=3.5

Biology

7. a) Draw the figure of bacteriophage and label its any two parts. What is chemotropism? Pituitary gland is called the master of glands, why? Write one function of cerebrospinal fluid. 2+1+1+0.5=4.5

b) What is heartbeat? Under what condition heartbeat is increased? Bleeding from artery is dangerous, why? 1+1+1=3

8. a) The given diagram is prophase of mitosis, justify with two points. Write two differences between self and cross pollination.

b) How is a zygote formed? Draw a labeled diagram of the fertilization process occurred, when the pollen grain reaches the ovary through pollen tube. 1.5+2=3.5

9. a) What is food chain? Describe the consequence that occurs if all the tigers are killed in the food chain. Classify the deer with a special characteristic of it. 1+1+1.5=3.5

Maize plant –> Deer –> Wolf –> Tiger

b) Why did Mendel choose pea plant for his experiment? Give two reasons. Draw a diagram of pyramid of biomass of both water ecosystem and land ecosystem. 2+2=4

Astronomy and Geology

10. a) What is fossil fuel? Write the name of periods in which man and dinosaur were evolved. Write two effects of depletion of ozone layer. 1+0.5+0.5+2=4

b) Write two difference between meteors and meteorites. How black hole is formed? Explain briefly. 2+1.5=3.5

## Optional Population Education

Group ‘A’

Attempt any 16 questions from this group. 16×5=80

1. Define family life education. Mention different parts of family.

2. Why delayed marriage is getting popular? Explain any five advantages.

3. Write any five methods to solve the problem of migration in Nepal.

4. What is population management? Write any two advantages of each using condom and pills.

5. What measures are necessary for gender equality in our society? Explain any five major steps in brief.

6. What do you mean by Anemia? Write its problem in Nepal briefly.

7. Write in brief:

• Child marriage
• Children the gift of God

8. Why does an employed villager try to migrate to the town? Write any five causes.

9. What are the impacts of religious beliefs on population growth? Describe.

10. Differentiate between:

• Punishable marriage and Voidable marriage
• Nuclear family and Joint family

11. Describe the conditions during conception and pregnancy.

12. Clarify the concept of gender and how can we classify gender? Write in short.

13. Write short notes on:

• Night blindness
• Micronutrient

14. What are the causes of migration in the context of Nepal? Write any five causes.

15. Write any five steps to be considered for women empowerment.

16. An educated and employed women has tendency to produce the limited number of children, why?

17. Abortion is the main cause of maternal health. Still why many women are interested in abortion? Give five reasons.

18. Write any three problems caused due to deficiency of vitamin ‘A’ and write any two measures to control of it.

19. How does women education bring changes in family status? Give your logic.

20. How does the size of family affect birth? Explain.

Group ‘B’

Attempt any questions from this group. 2×10=20

21. Mention any five objectives needed to empower women and describe briefly any five major challenges of women empowerment.

22. Define safe motherhood and what major aspects are needed to be taken into great consideration so as to provide safe motherhood service?

23. What are the three main functions of nutrients? How is nutrient classified by chemical compositions? Describe in brief with examples.