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Earth's Formation

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Amira O.

on 22 March 2013

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Transcript of Earth's Formation

Earth's Structure By: Amira Oguntoyinbo Formation Of the Earth Earth formed around 4.54 billion years ago by accretion from the solar nebula. Volcanic eruptions probably created the atmosphere, but the atmosphere contained no oxygen and would have been toxic to anything living. Much of the Earth was molten because of extreme volcanism and frequent collisions with other bodies. Parts Of the Earth The Earth consists of four parts the crust, the mantle, the outer core, and the inner core. Characteristics of the
parts of the Earth Crust- part of the Earth The crust is where we walk and is made out of rocks and such, about 5-70km thick

Mantle- The 2nd layer of the Earth, the mantle is the second layer, consisting of molten iron, and other metals. The mantle kind of reminds me of oatmeal it is not quite solid, nor liquid.

Outer Core- Is molten rock, and very HOT!!!

Inner Core- Made out of iron and nickel, the Inner Core is the hottest Earth part, The Inner Core is solid because of pressure. Igneous Rock (: Igneous rock is one of the 3 rock types that we see in the world today. It is formed through the cooling of lava or magma. There are many types of igneous rocks, some of them include, granite, pumice, obsidian, etc. Temperatures Why is the Inner Core Solid? Surprisingly, the inner core is solid, even though it is by far the hottest part of the Earth (at 9,800 F) . The reason for is that there is so much pressure on the inner core that it solidified. How do we Know? The temperature of the inner core can be estimated by considering both the theoretical and the experimentally demonstrated constraints on the melting temperature of impure iron at the pressure which iron is under at the boundary of the inner core Temperature's inside the Earth vary from being 70 degrees to 9,800 degrees. The crust is probably the coolest part,and the inner core is the hottest part since it is in the middle
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