Top 1000+ General Knowledge Quiz Questions with Answers - 3

Question: 11

What are fossil fuels?

Coal, petrol, diesel and coal gas are fossil fuels.

Coal is used for engines and machineries.

Petrol and diesel are used as fuels for automobiles, ships, trains and aeroplanes.

Cooking gas is used as a fuel for domestic purposes.

Question: 12

What are the effects of heat?

Heat energy produces a number of effects in materials and living beings. In materials heat causes change in dimension in state and in temperature.

Question: 13

Define melting and melting point?

The change of a solid into liquid due to heat is known as melting. The temperature at which a solid melts is known as melting point.

Question: 14

What is meant by radiation?

Transfer of heat from one body to another body directly without heating the space in between the two bodies is called radiation.

Question: 15

What are conductors and insulators?

Materials which allow to pass through them are conductors of heat.

Example - Iron, copper, aluminium etc.

Materials which do not allow heat to pass through them are called insulators or poor conductors.

Example - Wood, glass, rubber, mica etc.