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Q: With reference to the interior of the earth consider the following statements. 1. Body waves are generated due to the release of energy at the focus. 2. The denser the material, the lower is the velocity of the Earthquake waves. 3. There are two types of body waves. They are called P and S-waves. Which of the statements given above is / are correct?
  • A. 1 and 2 only
  • B. 2 and 3 only
  • C. 3 only
  • D. 1 and 3 only
Correct Answer: Option D - Body waves are of two kind → P–Primary waves and S-Secondary waves. Body waves travel through the inside layers of the earth whereas the seismic waves travel on the earth's surface. The internal of the earth has more density and body waves travel through it with highest velocity. Body waves are generated due to the release of energy at the focus.
D. Body waves are of two kind → P–Primary waves and S-Secondary waves. Body waves travel through the inside layers of the earth whereas the seismic waves travel on the earth's surface. The internal of the earth has more density and body waves travel through it with highest velocity. Body waves are generated due to the release of energy at the focus.

Explanations:

Body waves are of two kind → P–Primary waves and S-Secondary waves. Body waves travel through the inside layers of the earth whereas the seismic waves travel on the earth's surface. The internal of the earth has more density and body waves travel through it with highest velocity. Body waves are generated due to the release of energy at the focus.