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Multiple choice physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

Choose the correct statement.

  1. 'P' waves are slower than 'S' waves.

  2. Both 'P' and 'S' waves have same speed.

  3. 'S' waves are slower than 'P' waves.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The P waves and the S waves are the waves that travel throughout the planet. The P waves are the compression waves that apply force in the direction of propagation whereas the S waves are shear waves that make the medium particle move perpendicular to their direction of motion.
The energy is less easily transmitted in the medium in the case of S waves. So, P waves travel faster.

Option $C$ is correct.
Multiple choice physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

Waves produced due to earthquakes are known as :

  1. seismic waves

  2. shock waves

  3. infrasonic waves

  4. destructive waves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Seismic waves are the waves of energy caused by the sudden breaking of rock within the earth or an explosion, which travel through the earth's layers.

Multiple choice physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

Waves produced due to the earthquake are known as

  1. seismic waves

  2. shock waves

  3. infrasonic waves

  4. Tectonic waves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Seismic waves are the scientific term for waves produced by earthquakes. While shock waves describes their nature and many are infrasonic, seismic waves is the correct terminology used in seismology to describe waves that travel through Earth's layers.

Multiple choice physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

When did a major Tsunami occur in the Indian ocean?

  1. On $26^{th}$ December, $2004$.

  2. On $26^{th}$ July, $2004$.

  3. On $26^{th}$ December, $2001$.

  4. On $26^{th}$ July, $2001$.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A sudden disturbance under the Indian ocean led to Tsunami through the coastal areas of India on 26th December, 2004.

Multiple choice physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

Fill in the blank:

A sudden shaking or trembling of the Earth, caused by a disturbance deep inside the Earth's crust, is known as ________.

  1. tsunami

  2. flood

  3. earthquake

  4. landslides
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An earthquake is a sudden shaking or trembling of the Earth which lasts for a very short time.