- The crust is a layer of solid rock that includes both dry land and the ocean floor.
- The crust is much thinner then the layer beneath.
- In most part of the world the crust is about 5 and 40 kilometers thick.
- The crust that lies beneath the ocean is called oceanic crust.
- Continental crust, is the crust that froms the continents, contains many types of rock.
- About 40 kilometers beneath dry land, the rockin the Earth interior.
- The mantle is made up of hot rocks, but very solid.
- The mantle is nearly 3,000 kilometers thick.
- The most upper part of the mantle is britter rock.
- The mantle has two parts called Lithosphere and Asthenosphere.
Geologist Learn About Earth Interior
Geologist have used two main types of evidence to learn about the Earth's interior: direct evidence from rock samples and indirect evidence from seismic waves.
A few Vocabulary words.
- Seismic waves- vibrations that travel through Earth carrying the energy to release an earthquake.
- Pressure- THe force pushing on a surface divided by the area of that pressure.
- Basalt- A dark dense, igneous rock with a fine texture, found in oceanic crust.
- Granite- A usually light-colored igneous rock that is found in continental crust.
- Lithosphere- A rigid layer made up of the uppermost part of the mantle and the crust.
- Asthenosphere- The soft layer of the mantle on which the lithosphere floats.
- Outer Core- A layer of molten iron and nickel that surrounds the inner core of the Earth
- inner core- A dense sphere of solid iron and nickel at the center of the Earth