Rising Nepal Secondary Boarding School

First Terminal Examination 2074

Class: 10 F.M. 50

Time: 2 hrs. Subject: Science P.M. 16

Physics

  1. a) Define force. What is gravitation? [2]

b) State and prove Newton's law of gravitation. [2]

c) What is gravitational force when the distance between the object is made double? [3]

d) The effect of gravitation is more in liquid than in solid, why? [2]

  1. a) It is easier to pull a bucket of water from the well until it is inside

water but difficult when it is out of water. Why? [2]

b) As shown in the figure, a rubber and a wooden cork are floating in water, identify the rubber cork and wooden cork and why are they floating differently? [2]

c) What is an upthrust? What is atmospheric pressure? [2]

  1. a) Differentiate between renewable and non-renewable sources. [2]

b) Give two reasons to justify that the use of hydroelectricity should be increased more than that of fossil fuel energy. [2]

c) Write any four causes of energy crisis. [2]

d) What do you mean by solar energy? State principle of conservation of energy. [2]

  1. a) What do you mean by 1 calorie heat? Specific heat capacity of water

is 4200 Jkg-1 0C-1. What does it mean? [2]

b) Mention four effects of heat. [2]

c) How much heat energy is released when 5 kg mass of iron ball at 170C is reduced to 20C temperature? The specific heat capacity of iron is 470 Jkg-1 0C-1. [3]

Chemistry

  1. a) Write four differences between base and alkali. [2]

b) H2SO4 is called a king of chemical. Why? [2]

c) Choose the best answer: [3]

i) CuSO4 is ………… I) acidic II) basic III) neutral IV) alkaline

ii) Generally, metal oxide are …… I) acidic II) basic III) neutral IV) alkaline

iii) Sulphuric acid is a ……… I) strong acid II) weak acid

III) strong base IV) none

Biology

  1. a) Draw a diagram to show the life cycle of silkworm and explain them. [4]

b) Describe in short about egg of honey bee. [2]

c) Honey bee are vital pollinators. Why? [2]

Astronomy and Geology

  1. a) What do you mean by natural satellite? [1]

b) What are meteors? [1]

c) Write some words about the evolution of the universe on the basis of 'Big Bang Theory'. [2]

c) How are artificial satellites important? [1]

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