Question

which one of the following is not a indirect source of information about the interior of the earth ​

Answer 1

Answer:

Direct sources are not very reliable because mining and drilling can be done only up to some depth only.  Indirect Sources: Seismic waves, gravitational field, magnetic field, falling meteors etc are example of indirect sources. They are very important for know about earth's interior.

Explanation:

Hope this will help you!

Answer 2

Explanation:

Indirect sources include meteors that at times reach the earth, gravitation, magnetic field, and seismic activity. Most of our information about earth's interior has come from seismic studies. Seismic waves produced during an earthquake are recorded by a seismograph when these waves reach the surface of the earth.

Rocks obtained from mining areas and materials obtained from volcanic eruption are the direct sources of information about the interior of the earth.