Some Natural Phenomena 2

What kind of electric charge is acquired by a plastic comb rubbed with dry hair?

How an inflated rubber balloon can be charged by the method of friction?

Answer explanation

Lightning Conductor is a device used to protect buildings from the effect of lightning.

What is focus of an earthquake?

Answer explanation

An earthquake is a sudden shaking or trembling of the earth lasting for a very short time. It is caused by a disturbance deep inside the earth’s crust.

What is the instrument used to measure and record an earthquake?

Answer explanation

seismograph

What is epicentre of an earthquake?

What type of electric charge is acquired by a rubber balloon when rubbed with a woolen cloth?

Answer explanation

When balloon is rubbed with a woolen cloth, it acquires negative electric charge.

What are seismic waves?

Answer explanation

The tremors produce waves on the surface of the earth. These are called seismic waves.

Which device is used to protect buildings from the effect of lightning?

Answer explanation

Lightning Conductor is a device used to protect buildings from the effect of lightning.

What is an earthquake? What causes them to happen?

Answer explanation

An earthquake is a sudden shaking or trembling of the earth lasting for a very short time. It is caused by a disturbance deep inside the earth’s crust.

If scientists know so much about earthquakes, can they also predict when and where the next one will strike?

Answer explanation

Although, we know for sure what causes an earthquake, it is not yet possible to predict when and where the next earthquake might occur.