Inside The Earth

By Kiera Steck

Earths Core

The depth of the core ranges between 2890- 6378 km. The cores sub layers are the inner and the outer core. even though the inner core is extremely hot, its under so much pressure that it becomes a liquid. Another fact about the core is that it is made of iron. The iron in the inner core actually makes the planet magnetic. The outer cores temperature ranges between 4,400, 8,000 degrees C. The temperature of the inner core is between 5,000 and 6,000 degrees C. The depth of the inner core is 5,190. Outer cores depth is 2,300. The core makes up about 1/3 of the earth. the outers cores thickness is 2,300 km

the thickness of the inner core is 2.200

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Earths Mantle

Now that we've learned about the core lets go a little farther outside of the earth, today were going to learn all about the mantle. Earths mantles temperature ranges between 500 through 900 degrees C. The depth of the mantle is between 5-70 kilometers. Mantles thickness is 2,900 km thick. The sub layers for the mantle is the Asthenosphere layer in Earth's mantle between the lithosphere and the upper mantle nd the Lithosphere. The lithosphere is the thin layer for the upper mantle its very similar to the crust except its cooler and rigid. with the crust and the mantle it creates the Lithosphere.
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Crust

Okay so we've learned about the mantle but now lets go all the way out and learn all about the crust, including continental and oceanic crust. The temperature of the crust depends on the air temperature. Crusts depth is 0 it cant go into or go deeper into any other layer the crust is the last layer of the outside. The crusts thickness ranges from

5-70 km. The sub layers for the crust is continental and oceanic. The crust is divided into two types oceanic crust and continental. Oceanic crust is found on the sea floor its made out of dense rocks and that's called basalt rocks. The continental crust is mad

out of granite and its found under land masses. A fact about the oceanic crust unlike

Continental crust is that oceanic crust is still being formed in some regions its mostly found in mid ocean ridged. from mid ocean ridged places magma erupts through small or big cracks in the sea floor it creates crust as its cooling. A fact about earths is the crust is thinner beneath the oceans sea floor. Did you know that when India and Asia collided and crashed it formed the Himalayas. Earth quakes and volcanoes are primly found at the plate boundaries. thats all about the crust.

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Convection In The Mantle

Convection currents happen in the mantle, when the core heats up the mantle, and makes it less dense, so it rises. It spreads out and cools. Then it is now cool, it becomes more dense and gravity pulls it down. It then gets heated back up, and starts the cycle all over again. The cycle effects Plate Tectonics and that causes earth quakes and volcanoes.

Citations

2:earthssructureInteractive Dynamic Earth AnnenBerg Foundation 10/2314


:http://www.learner.org/interactives/dynamicearth/structure.html


1:Earth's Insides" Earth's Insides 10/23/14 http://www.colorado.edu/physics/phys2900/homepages/Marianne.Hogan/inside.html

Questions?

1:) How would convection currents happen if there were no earth quakes or volcanoes?


2:) Why does the cool air rise instead of going back underground?


3:) If there was no convection currents could earth quakes happen or could volcanoes still erupt of would volcanoes become dormant?