NSO Level 1- Science Olympiad (SOF) Class 8: Questions 635 - 640 of 1076

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Question number: 635

» Metals and Non-Metals

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MCQ▾

Question

Electric wires are coated with insulating material. The reason is

Choices

Choice (4)Response

a.

A and b are the explanation of c

b.

Metals are good conductors of electricity

c.

To safeguard from electric shock

d.

Electric wires are made up of metals

Question number: 636

» Metals and Non-Metals

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MCQ▾

Question

Metals are generally solids. But ________ metal is in liquid state

Choices

Choice (4)Response

a.

Gallium

b.

Lead

c.

Beryllium

d.

Mercury

Question number: 637

» Reproduction in Animals

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MCQ▾

Question

The method of fertilisation seen in reptiles and birds is called

Choices

Choice (4)Response

a.

Internal fertilisation

b.

External fertilisation

c.

False fertilisation

d.

None of the above

Question number: 638

» Reproduction in Animals

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MCQ▾

Question

Internal fertilisation takes place

Choices

Choice (4)Response

a.

Outside the female body

b.

Inside the female body

c.

Outside the male body

d.

Inside the male body

Question number: 639

» Metals and Non-Metals

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MCQ▾

Question

Iron is used in construction work in concrete pillars and making grills. Which property of metals is used here?

Choices

Choice (4)Response

a.

Hardness and strength

b.

Ductility

c.

Malleability

d.

Both a. and c. are correct

Question number: 640

» Combustion and Flame

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MCQ▾

Question

Sharda’s grandmother lives in a village and cooks on chulha and uses dry wood or coal as fuel. Sharda’s mother uses LPG for cooking. She checked the colour of the flames. She observed that the flame is yellow in chulha while it is blue in a gas stove. The reason for the colour change in the flame is

Choices

Choice (4)Response

a.

LPG is a complete fuel

b.

Complete combustion takes place in a gas stove

c.

Incomplete combustion takes place in a choola

d.

All a. , b. and c. are correct

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