State True or False:

We can predict earthquake.

Which of the following cannot be charged easily by friction?

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

Write T against true and F against false in the following statements:

Like charges attract each other.

Write T against true and F against false in the following statements:

A charged glass rod attract a charged plastic straw.

Lightning conductor cannot protect a building from lightning.

Write T against true and F against false in the following statements:

Earthquakes can be predicted in advance.

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

Explain why a charged body loses its charge if we touch it with our hand.

Name the scale on which the destructive energy of an earthquake is measured. An earthquake measures 3 on this scale. Would it be recorded by a seismograph? Is it likely to cause much damage?

Suggest three measures to protect ourselves from lightning.