All comics by SarahLaughsAlot31

 

Today, I'm gonna teach you about the Layers of the Earth. Let's get started shall we?
Sounds Great!
This is the Crust. Since it is the top layer, it has the least heat and pressure. It is also the thinnest layer!
Wow that's so cool! I wonder how deep it is... and how hot... there are so many questions!
Well I bet you have tons of questions. This layer is

 

Today, I'm gonna teach you about the Layers of the Earth. Let's get started shall we?
Sounds Great!
Since it is the top layer, it has the least heat and pressure.
This is the Crust. It's the top layer and the thinnest layer! Oceanic Crust is made of dense rock like basalt. Continental Crust is made of less dense rock like granite.
Based on my background knowlage, I'm guessing this layer consists of the elements oxygen, silicon, aluminum, calcium, iron, sodium, potassium, and magnesium?
Correct!! The crust is a solid layer and this layer is 5-40 km thick and it starts off cool but the temperature increases as you go down (1ºC per 40 m depth). Pressure also increases as you go deeper
I never knew that! I'm learning so much!!

 

The pressure goes up when you go deeper into the earth!
That was awesome! Can we explore more layers?
Of course! Let's take a trip to the Mantle! It's the largest layer and it's located right under the crust.
Mantel Composition: Silicon, Oxygen, Iron and Magnesium
This is the mantle! It is split into 3 parts: Lithosphere: Solid Asthenosphere: “plastic” (can flow) Inner Mantle: Solid
Woah! That's a lot of layers!
It may be a hot layer, but not the hottest.
Be careful, it's a bit hotter and has a bit more pressure! In fact, it's 870-2,200ºC!
Ow! My hand! You're right. From now on I'll be more careful.

 

Here's the core the inside layer. There's an outer & inner core that we'll be visiting. The outer core is liquid iron and nickel. Since more pressure is on the inner core, it is solid iron and nickel.
Wow! I didn't know pressure & heat could change something's state of matter so much! I hear that the outer core is between the mantle & the inner core, so the inner core has to be the innermost layer!
I learned that the outer core is 2,250 km in depth and the inner core is 1,200 km in depth. Thats a really big core!
It is really big! You have to be more careful this time since the core ranges from 2,200-5,000ºC!! That's as hot as the sun's surface & the inner core has the most extreme pressure of all the layers!

 

While we're traveling back to our ship, let's share some more knowledge. You start.
I know that currents in the liquid outer core cause the solid inner core to spin. The inner core spins slightly faster than the rest of the planet.
Since it contains a large amount of iron, this creates Earth’s magnetic field, right?
Exactly! One other thing I know is that the inner core has such extreme pressure that it squeezes the iron and nickel atoms so much that they cannot spread out and become a liquid.
The Asthenosphere is different than the Lithosphere because it is somewhat soft and “plastic” (it flows slowly).
It's amazing how much you learned! Remember the difference between the Lithosphere and the Asthenosphere!
I know the difference! The Lithosphere is made up of the crust and the outer most part of the Mantle. It forms a rigid, rocky layer. The Asthenosphere is below the Lithosphere.

 

The End.
I hope you learned a lot from our journey into Earth's layers!!!
Thank you for coming! I hope you had fun!!!
by SarahLaughsAlot31, 3-08-12

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