Walk Around Notes!.

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Presentation transcript:

Walk Around Notes!

Crust! The crust is the thinnest and least dense layer. The crust is made up of many broken pieces called tectonic plates. There are two kinds Continental and Oceanic. All life exists in/ on the crust of the Earth. Thickness 5-100 KM Composition Mostly Oxygen, Silicon, Aluminum, and Granite Temperature Ranges from air temperature to 870 C Density 2.7 – 3.3 g/cm3

Mostly iron and magnesium Mantle! The mantle is below the crust. The mantle is the LARGEST layer of the earth containing about 80% of the Earth’s volume. The mantle is divided into three regions; the upper, middle and the lower sections. The mantle consist of solid rock in the upper region and liquid rock in the lower region. Density increases in the mantle as the depth increases. Thickness 100km – 3,000 km Composition Mostly iron and magnesium Temperature 870 C – 3,700 C Density 3.3 – 5.7 g/cm3

Outer Core! The core of the Earth is like a ball of very hot metals. Thickness 3,000 km – 5,200 km Composition LIQUID iron and nickel Temperature 3,700 C – 4,300 C Density 9.9 – 12.2 g/cm3 The core of the Earth is like a ball of very hot metals. The outer core is liquid. The outer core is made up of iron and is VERY dense.

Inner Core! Thickness 5,200 km – 6,428 km Composition SOLID iron and nickel Temperature 4,300 C – 7,200 C Density 12.6 – 13 g/cm3 The inner core of the Earth has temperatures and pressures so great that the metals are squeezed together and are not able to move. The inner core is a solid.

Lithosphere! Consists of the uppermost part of the mantle and the crust. This is the part of the layers that contains the tectonic plates.

Asthenosphere! More fluid layer of the mantle, but not liquid. Temperature increases with the depth as does density This layer is where the circulation of heat causes the plates to move.

Mesosphere! Lowest layer of mantle Solid layer of rock