Secondary School (English Medium) (5 to 8) Class 8 - CBSE Question Bank Solutions for Science

The same kind of plants grown and cultivated on a large scale at a place is called _________.

Match the items in column A with those in column B.

Give two examples of kharif crop.

Give two examples of rabi crop.

If wheat is sown in the kharif season, what would happen? Discuss.

In order to meet the ever-increasing demand in factories and for shelter, trees are being continually cut. Is it justified to cut trees for such projects? Discuss and prepare a brief report.

Friction opposes the ______ between the surfaces in contact with each other.

Friction depends on the ______ of surfaces.

Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of frictional force acting on it.

Explain why sportsmen use shoes with spikes.

Give examples to show that friction is both a friend and a foe.

Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?

When a glass rod is rubbed with a piece of silk cloth the rod ______.

A charged glass rod attracts a charged plastic straw.

Lightning conductors cannot protect a building from lightning.

Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.

Suggest three measures to protect ourselves from lightning.

The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.

Which one of the following conditions is not essential to grow maize?

Propagation of ginger is generally done using