SSLC (English Medium) कक्षा ८ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Light bends as it passes from one medium to another. What is this phenomenon called?

Light travels fastest in a vacuum. Why?

Heat capacity C’= ______.

Metals like copper and aluminum are good conductors of heat and electricity.

Lighting rods are made of ______.

______ is another example of discharge that takes place in clouds.

During thunderstorms, the air is moving ______ rapidly. This air moves rapidly.

Huge quantities of electricity are discharged in lightning flashes and temperatures of over ______°C or more can be reached.

______ extreme heat will vaporize the water inside a tree, creating steam that may burn out the tree.

______ arrestor is a device used to protect buildings from the effects of lightning.

Who discovered static electricity or lightning in clouds?

How can you save yourselves from lightning?

How does thunder take place?

Sometimes lighting may be seen before the thunder is heard. Why?

During lightning and thunder, we should avoid standing in-ground and open spaces Why?

______ instruments produce a specific sound when they are struck, scrapped, or clashed together.

The first-ever satellite ______ was launched in 1975.

Mars rotates about its own axis once in ______ hours______ minutes.

Match the following:

Name an Indian pilot who was selected as a cosmonaut in a joint space program between India and Soviet Russia.