Distinguish between -

Primary and Secondary Seismic Waves

Arrange the following statements in chronological order in which an earthquake occurs.

A. The earth’s surface vibrates

B. The plates suddenly move.

C. Due to the movements in the mantle, compression goes on increasing.

D. Along the weak points (fault lines) rocks break apart.

E. Stored energy is released in the form of seismic waves.

Distinguish between -

Block Mountain and Fold Mountain

Distinguish between -

Earthquakes and volcanoes

Answer in brief

Give reasons why an earthquake occurs.