Science Olympiad Class-8 Paper-3

Test Preparation on Science Olympiad Class-8 Paper-3

1.

What is the major difference between a human
skin cell and a human egg cell?

1The egg cell has twice as many chromosomes as the skin cell.
2The egg cell has half as many chromosomes as the skin cell.
3The skin cell has no genetic information in its chromosomes.
4Only the egg cell has a nucleus.

2.

Arrange the following planets in increasing order
of time required to complete one revolution
around Sun.
(i) Earth (ii) Uranus
(iii) Mars (iv) Jupiter

1(i), (ii), (iii), (iv)
2(i), (iii), (iv), (ii)
3(iv), (iii), (ii), (i)
4(ii), (iii), (i), (iv)

3.

When a glass rod is rubbed with a piece of silk cloth-

1Both cloth and the rod acquire positive charge
2Rod becomes positively charged while the cloth has a negative charge
3Rod becomes negatively charged while the cloth has a positive charge
4Both cloth and the rod acquire negative charge.

4.

Which of the following exert pressure?

1Solids
2Liquids
3Gases
4All of these

5.

The oxide of sulphur (which can be further oxidised) when dissolved in water gives-

1H2S
2H2SO3
3H2SO4
4H2

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