Page 79 - Social Science 2_flatten

Maharashtra, Andhra Pradesh, Earthquake

Rajasthan, Odisha and Karnataka. • An earthquake is a sudden trembling
or shaking of a part of the Earth’s
Cyclone
surface caused by movements beneath
• Cyclones are powerful natural
it.
phenomena characterised by large-

scale circular movements of strong
winds blowing at very high speed.

• They can be destructive and are often
accompanied by heavy rainfall.

• Certain coastal areas in India, such as

West Bengal, Odisha, Andhra Pradesh,
Tamil Nadu, Maharashtra, and Gujarat A damaged building a er earthquake
are frequently affected by cyclones.
• The trembling of the Earth is known as

a tremor, and tremors can vary in
intensity.

In 2021, Gujarat faced Cyclone Tauktae, • The intensity of an earthquake is
the deadliest cyclone to hit the Arabian Sea measured by its magnitude. High-
in a decade. It made landfall in Gujarat with
magnitude earthquakes can cause
wind speeds of around 160-170 km/h, damage to life and property, while low

destroying houses, trees and electricity
magnitude ones may go unnoticed.
poles.
• Earthquakes mostly occur along weak
Light Up YourThinking Remembered Percep on zones in the Earth’s crust. A fault is a
weak zone along which a block of the
Read the statements A (Assertion) and R
Earth's crust fractures (cracks) and
(Reason) and choose the correct answer
moves up or down.
from the given options.

a. Both A and R are true, and R is the correct • Earthquakes are recorded by an
explanation of A. instrument called a seismograph . It
b. Both A and R are true, but R is not the measures and records details about the

correct explanation of A. magnitude and duration of an
c. A is true, but R is false. earthquake, which are expressed on
d. A is false, but R is true. the Richter Scale.
Assertion (A): A tsunami may be caused by

severe earthquakes.
Reason (R): An earthquake may cause severe India is divided into earthquake zones.
tsunami. Which zone does your city or region fall in?

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