Granite is a rock usually is light color and has coarse grains. Basalt is a dark fine grained rock.
The lithosphere-is the upper part of the mantle that is hard,strong and ridge and averages about 100 kilometers deep.
The asthenosphere-is the middle layer is hotter than the layer above but less ridge. It is solid but can bend like a metal spoon.
The mesosphere-is the last layer in the mantle. This layer is hotter and more ridge then the layer above. This layer is really stiff because of the presser .
The outer core-is a layer of molten metal surrounding the inner core.
The inner core-is a dense ball of solid metal,extreme presser squeezes the atoms of the iron and nickel so much that it can not spread out to become liquid.
How do geologist learn about the earth interior
direct/rock samples- Geologist have drilled holes as deep as 12.3 kilometers into earth,the drills bring up samples of rock.These rocks give geologist clues about earths structure and condition deep inside earth.
indirect/seismic waves- To study earths interior geologist use an indirect method. When earthquakes occur, they produce seismic waves. Geologist record these seismic waves and study how they travel through earth. The speed of the seismic wave and the paths they take give geologist clues about the structure of the earth.