4. How do we know Earth has layers? 5. Name an organic compound that we may study in geology this semester.
The last two questions only
Their are various ways through which we can find out that earth has layers these are :
1) Sesmic waves : As we know earthquakes generate seismic waves and these waves travel at different speeds when they pass through different materials. So by studying these waves it helps us to find out about the internal structure of the earth.
2) Volcanic eruption : As we know that during a volcanic eruption different types of molten minerals come out on earth's surface the and each layer has different minerals and sediments of these materials gives us insight about earth layers.
3 )Geological samples : As we know that while drilling and mining we find different materials and minerals at different depths.
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