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what are the factors used to learn thr interior of the earth pls tell

Dear Student.



a. There are many factors used by scientists to study Earth's interiors .
b. They use seismic earthquake waves to study  interiors of the earth.There are large number of changes that take place in the interiors of the earth caused by endogeneic forces, like volcano, earthquakes etc, which are analysed.
c. Information so collected determine the nature of layers. 
d. Further, Scientists also use drilling to study earth's crust .
e. Scientists have also used drilling machines , making holes to collect information about the characteristics and properties of core, mantle.


Regards

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Since the information recorded on a seismogram tells us how fast body waves are moving when they travel through Earth, we can tell what type of material they're traveling through. As body waves travel through the Earth's internal layers, their speed changes, causing the wave to 'bend.'

This bending is similar to looking at a straw in a half-full glass of water. If you look at the straw from the side, it appears to 'bend' where it hits the surface of the water. This is because the light waves are bending and slowing down as they hit the different material, in this case, the water. The same thing happens to body waves when they travel through the earth.

We know that the surface of the earth is solid because we can easily see this. But, we need body waves to tell us what lies below. What they tell us is that directly below the crust is a layer of rock with a different density. As we learned in another lesson, this layer is called the mantle, and we know that it's a different density than the crust because seismic waves 'bend' and suddenly pick up speed where these two layers meet.

P waves can travel through both liquid and solid material, but S waves can only travel through solids. Since both P waves and S waves travel through the mantle, this means that it must be a layer of solid material. The really interesting part about this 'solid' layer is that even though it is rock, it 'flows' like a very thick liquid. It's similar to the consistency of silly putty, which if you punch hard, feels like a solid, but if you stretch slowly, moves like a liquid.

hope this helps.
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Since the information recorded on a seismogram tells us how fast body waves are moving when they travel through Earth, we can tell what type of material they're traveling through. As body waves travel through the Earth's internal layers, their speed changes, causing the wave to 'bend.'

This bending is similar to looking at a straw in a half-full glass of water. If you look at the straw from the side, it appears to 'bend' where it hits the surface of the water. This is because the light waves are bending and slowing down as they hit the different material, in this case, the water. The same thing happens to body waves when they travel through the earth.

We know that the surface of the earth is solid because we can easily see this. But, we need body waves to tell us what lies below. What they tell us is that directly below the crust is a layer of rock with a different density. As we learned in another lesson, this layer is called the mantle, and we know that it's a different density than the crust because seismic waves 'bend' and suddenly pick up speed where these two layers meet.

P waves can travel through both liquid and solid material, but S waves can only travel through solids. Since both P waves and S waves travel through the mantle, this means that it must be a layer of solid material. The really interesting part about this 'solid' layer is that even though it is rock, it 'flows' like a very thick liquid. It's similar to the consistency of silly putty, which if you punch hard, feels like a solid, but if you stretch slowly, moves like a liquid.
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