What do you think is the reason that scientists divide the Earth into two different sets of layers?
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Instructor: Sarah Friedl
Sarah has two Master's, one in Zoology and one in GIS, a Bachelor's in Biology, and has taught college level Physical Science and Biology.
Cite this lesson
Earth is made up of several different layers, each with unique properties. In this video lesson, you will identify each layer of Earth and how it relates to Earth as a whole.
Earth's Core
You may have heard that ogres are like onions because they have many layers. Well, Earth is the same way! Earth is made up of several different layers, each of which has unique properties.
Let's start from the inside and work our way out. Earth has a core, but this is really two distinct parts: the inner core and the outer core. Both parts of the core are made up of mostly iron and some nickel. The difference is that in the inner core, those minerals are solid and in the outer core, they're liquid.
The inner core of the earth is incredibly hot - so hot that if you tried to dig a hole to China, you'd burn up on your way through the earth! What's amazing about the inner core is that even though it's about as hot as the surface of the sun, there's so much pressure from the weight of the world pushing down on it that it can't melt. This is the same reason that water in a pressure cooker doesn't boil, no matter how hot it gets!
The outer core is also made up of iron and nickel, but it's quite different because it is a liquid. This is because there is much less pressure on this layer than the one below it (the outer core adds a lot of pressure to the inner core!). Though the flow of this liquid layer is very slow-moving (about a few kilometers a year), it is what produces Earth's magnetic field. Our North and South Poles exist because of this liquid outer core, even though it's almost 2,000 miles below us.
Hello!!
There are actually 4 different layers.
1. Crust
2. Mantle
3. Outer Core
4. Inner Core
Scientists divided the layers because of each of the layers have different temperatures, minerals, and elements that are needed to create each layer
hope it helps u..
plz mrk it as brainliest