Earthquakes and Tsunamis Concepts

The video tutorial covers the basics of earthquakes, including their causes, types of waves, and measurement methods using the seismograph, Richter, and Mercalli scales. It discusses the constructive and destructive effects of earthquakes, such as landform creation and tsunamis. The tutorial also highlights major earthquake zones and provides examples of significant earthquakes in India. Finally, it addresses the challenges of predicting earthquakes despite advances in technology.

What is the primary cause of an earthquake?

• Sudden shaking of the earth's crust due to internal disturbance

• Volcanic eruptions

• Tidal waves

• Heavy rainfall

Which instrument is used to record the movement of seismic waves?

• Anemometer

• Thermometer

• Seismograph

• Barometer

On the Richter scale, how much more powerful is a magnitude 7 earthquake compared to a magnitude 6?

• 2 times

• 5 times

• 10 times

• 20 times

Why is the Mercalli scale less commonly used than the Richter scale?

• It is harder to understand

• It is less accurate

• It is based on observed effects which vary by region

• It is more expensive

What is one constructive effect of earthquakes?

• Destruction of buildings

• Formation of new landforms

• Triggering of landslides

• Causing tsunamis

What is an avalanche?

• A sudden flood

• A volcanic eruption

• A mass of ice and snow sliding down a mountain

• A large ocean wave

What is the primary cause of a tsunami?

• Heavy rainfall

• Undersea earthquake

• Volcanic eruption

• Strong winds

What does the Japanese word 'tsunami' mean?

• Destructive wave

• Ocean wave

• Harbor wave

• Earthquake wave

Which region is part of the Circum-Pacific Mountain Belt?

• The Himalayas

• The Andes

• The Alps

• The Rockies

What was a significant cause of the 2011 earthquake in Sikkim, India?

• Movement of the Indian plate towards the Eurasian plate

• Tidal waves

• Volcanic eruption

• Heavy rainfall