Fortnightly Sub Test-1A (C-08) Phase-I - Science (16!05!2021)
Fortnightly Sub Test-1A (C-08) Phase-I - Science (16!05!2021)
Fortnightly Sub Test-1A (C-08) Phase-I - Science (16!05!2021)
Phase-I
Code-A
Topics Covered :
Physics : Force and Pressure (Complete Chapter)
Chemistry : Synthetic Fibres and Plastics: (Chemistry of Fibres and Plastics, Classification of Polymers,
Fibres)
Biology : Crop Production and Management (Complete Chapter)
GENERAL INSTRUCTIONS :
SECTION-A
Multiple Choice Type Questions : [5×1=5]
1. Which of the followings is a contact force? [1]
(1) Magnetic force (2) Gravitational force
(3) Electrostatic force (4) Muscular force
2. A very familiar form of polyester which is used for making bottles and utensils is [1]
(1) Acrylic
(2) PET
(3) Rayon
(4) Nylon
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Class-VIII Fortnightly Subjective Test-1_Science (Code-A)_Phase-I
3. Polywool is a mixture of [1]
(1) Polyester and silk (2) Cotton and wool
(3) Polyester and cotton (4) Polyester and wool
SECTION-B
Short Answer Type Questions : [5×3=15]
11. Give one example in each of the following cases. [3]
(i) A force stops a moving body.
(ii) A force causes motion of a body.
(iii) A force changes the shape of a body.
12. (i) Define weight of a body. [1]
(ii) Write any two points where weight of the body becomes zero. [2]
13. Write the name of the first fully synthetic fibre and its four properties. [3]
OR
Compare synthetic fibres and natural fibres on the basis of their [3]
(i) Strength
(ii) Fire catching capacity
14. (i) Explain, how does soil become poorer in certain nutrients. [2]
(ii) What is manuring? [1]
15. (i) What is harvesting? How much time is required for a cereal crop to mature? [1]
(ii) What are the names of traditional methods of irrigation in which following systems are used?
(a) Pulley system [1]
(b) Lever system [1]
OR
Give a brief note on plough. [3]
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Fortnightly Subjective Test-1_Science (Code-A)_Phase-I Class-VIII
SECTION-C
Long Answer Type Questions : [3×5=15]
16. (i) Define contact and non-contact forces. [2]
(ii) Define the following forces. [3]
(a) Magnetic force
(b) Gravitational force
(c) Electrostatic force
OR
(i) Calculate the weight of a body having mass 7 kg. [1]
(ii) Define atmospheric pressure. [1]
(iii) Write the relation between pressure and depth variation. [1]
(iv) A 5 kPa pressure is exerted on a cube of area 10 cm2. Calculate the force applied on the cube. [2]
17. (i) Write any two differences between linear polymers and branched chain polymers. [2]
(ii) Define the following:
(a) Petrochemicals [1]
(b) Polymers [1]
(c) Natural fibres [1]
18. (i) Answer the following questions regarding the given figure.
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Edition: 2021-22