Consider the various sources of information related to the Earth Interior. Classify the above as DIRECT & INDIRECT sources of information. Give reasons
Seismic activity Earth ‚magnetism
Volcanoes Mined rocks
Gravitational force Meteors
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The interior of earth can be known by direct and indirect source.
When mining, drilling or during volcanic eruptions, the interior layer of earth can be identified which is called the direct sources. eg., Volcanoes Mined rocks. Seismic waves, gravitational field, magnetic field, falling meteors form the indirect sources.
By analysing seismic waves, two things can be inferred.
The earth has three layers and each layer has unique density.
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