Morning Star solutions for Total Geography [English] Class 9 ICSE chapter 8 - Earthquakes [Latest edition]

A tremor below the surface of the earth which causes shaking of the crust:

Assertion (A): A tsunami is a large destructive ocean wave that can be generated by any disturbance that rapidly displaces a large mass of water.

Reason (R): The most common cause is an undersea earthquake.

A series of shocks that result from sudden earth movement:

Which amongst the following is NOT a factor that causes an earthquake?

Which waves are recorded on a seismograph after the P waves?

Which of the following measures the power of an earthquake on a scale of 1 to 9?

The point on the earth’s surface directly above the seismic focus is called ______.

The instrument that grades the earthquakes on the basis of observed effects on a 12-point scale.

Which, amongst the following, is NOT a destructive effect of earthquakes?

A large destructive ocean wave that can be generated by any disturbance (earthquakes, volcanoes, etc.) that rapidly displaces a large mass of water:

Which of the following is not correct?

What is called an earthquake?

Give one recent example of an earthquake.

State two natural causes of an earthquake.

Name two man-made causes of an earthquake.

Give one example of a man-made earthquake.

What are known as seismic focus and epicenter with respect to an earthquake?

What is known as the Richter scale?

State the uses of the Richter scale.

How are earthquakes useful?

Give any two destructive effects of earthquakes.

What is a tsunami?

Give one recent example of a place struck by a tsunami.

How do Japanese predict earthquakes?

Name the two belts where most of the earthquakes occur.

Describe how earthquakes are caused on the surface of the earth.

What is the difference between seismic focus and epicenter?

Give a geographical reason for the following:

Most earthquakes occur on account of plate movements.

Give a geographical reason for the following:

Primary waves are the first earthquake waves to be recorded on a seismogram.

Give a geographical reason for the following:

Volcanic activity and earthquakes occur in the same belt.

Explain the three types of earthquake waves.

The destructive effects of an earthquake are far more than its constructive effects. Give reasons to support your answer.

‘Prevention is better than cure.’ How does this statement apply to earthquakes? Give reasons to support your answer.

Imagine you were sitting on the balcony of a seaside resort when you suddenly noticed waves rising high in the sky. Suddenly there was a surge in the height of the waves, and they turned into a tsunami. What could have caused this tsunami, and what were its consequences?

On an outline map of the world, show the world distribution of earthquakes. Mark earthquake-prone areas in India. Identify the reasons for earthquakes in each region.