CREST Science Olympiad (CSO) Class 8 Sample Paper

CLASS

8
SAMPLE PAPER

CREST Science Olympiad (CSO)

Syllabus for CSO is available at https://www.crestolympiads.com/cso-syllabus

Pattern And Marking Scheme
Class Topic/Section No. of Questions Marks per Questions Total Marks
Practical Science 25 1 25
1st to 4th Achiever’s Section 10 2 20
Grand Total 35 - 45
Practical Science 40 1 40
5th to 10th Achiever’s Section 10 2 20
Grand Total 50 - 60

1. Which of the following statements is/are correct?
(1) The nature of the matrix differs according to the function of the tissue.
(2) Fats are stored below the skin and in between the internal organs.
(3) Epithelial tissues have intercellular spaces between them.
(4) Cells of striated muscles are multinucleate and unbranched.

a) Only 2 b) Only 3
c) Both 1 and 3 d) 1, 2 and 4

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2. Refers to be given crops:

(i) Wheat (ii) Groundnut
(iii) Gram (iv) Maize
(v) Pea (vi) Soyabean
(vii) Paddy (viii) Mustard

Select the option which correctly identifies the crops grown in rainy season (P) and the
crops grown in the winter season (Q):

P Q b) P Q

(i), (iii), (iv), (vii) (ii), (v), (vi), (viii) (ii), (iv), (vi), (vii) (i), (iii), (v), (viii)

a) b)

P Q P Q

(i), (ii), (iv), (vii) (iii), (v), (vi), (viii) (ii), (iv), (v), (vii) (i), (iii), (vi), (viii)

c) d)

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3. Refer to the given figures showing different microorganisms. Select the correct option
regarding the disease caused by these microorganisms:

P Q

a) b)

c) d)

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4. Read the following statements carefully and identify P, Q, R and S respectively:
(i) P is a plastic that once molded can’t be moulded and is used to make switches and
g electrical appliances.
(ii) Q is a polymer obtained from plants which is used to produce paper products.
(iii) R is a plastic that gets deformed on heating and is used in building and
g construction.
(iv) S is a synthetic fiber and is used to make sweaters and tracksuits.

a) P-Polythene, Q-Wool, R-Melamine, S-Kevlar
b) P-PVC, Q-Cellulose, R-Bakelite, S-Nylon
c) P-Bakelite, Q-Cellulose, R-PVC, S-Acrylic
d) P- Melamine, Q-Cotton, R-Polythene, S-Acrylic

5. Study the flow chart and identify P, Q, R and S respectively:

a) P: Fruits, Q : Sugar, R : Salt, S : Oil & Vinegar
b) P: Sugar, Q : Salt, R : Oil & Vinegar, S : Fruits
c) P: Salt, Q : Sugar, R : Fruits, S : Oil & Vinegar
d) P: Oil & Vinegar, Q : Salt, R : Fruits, S : Sugar

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6. Tim was performing an experiment. He took the sample of 4 metals Al, Zn, Fe and Pb
and added to the solution of copper sulphate one by one.
Which of the following reaction(s) is/are correct?
(i) 2Al + 3CuSO4 Al2(SO4)3 + 3Cu
(ii) Zn + CuSO4 ZnSO4 + Cu
(iii) Fe + CuSO4 FeSO4 + Cu
(iv) Pb + CuSO4 PbSO4 + Cu

a) Only 1 and 2 b) Only 2 and 3
c) Only 1, 2 and 3 d) 1, 2, 3 and 4

7. A girl stands on a box having 68 cm length, 48 cm breadth and 28 cm width in three
ways. The pressure exerted by the box will be _____________________.

a) maximum when breadth and width form the base
b) maximum when length and breadth form the base
c) maximum when width and length form the base
b) the same in all the above cases

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8. A boy standing in front of a vertical cliff fires a gun. He hears the echo after 4 seconds.
On moving closer to the cliff by 90 m, he fires again. This time, he hears the echo after
2.4 seconds. Calculate the distance of the cliff from the final position of the man:

a) 112.5 m b) 22.5 m
c) 190 m d) 150 m

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Achiever’s Section

9. Rayan conducted the experiment to check the conductivity of the following solutions. He
made the following conclusion:

P. Distilled water and ethyl alcohol are electrolyte and will make the bulb glow brightly.
Q. Copper sulphate is an electrolyte. If one of the electrodes is plated with copper, the
g other electrode will become cathode.
R. Copper sulphate is an electrolyte. If one of the electrodes is plated with copper, the
g other electrode will become anode.
S. Kerosene does not conduct electricity.

Which of the above statements is/are correct?

a) Only P b) Both P and Q
c) Both R and S d) P, Q and R

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10. Read the following statements carefully:
X gives red colour in flame test and is used in making batteries.
Y gives yellow-orange colour in flame test and is used in making vapour lamps.
Z gives blue-green colour in flame test and is used in refrigeration and air conditioning
j applications.

Identify X, Y and Z:

a) X : Sodium, Y : Lithium, Z : Copper b) X : Lithium, Y : Copper, Z : Potassium
c) X : Sodium, Y : Copper, Z : Potassium d) X : Lithium, Y : Sodium, Z : Copper

Answers

1. (d), 2. (b), 3. (d), 4. (c), 5. (b), 6. (d), 7. (a), 8. (b), 9. (c), 10. (d)

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