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What is the main characteristic
of each layer of Earth?

User Selfagency
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The atmosphere the air of Earth (and some other planets) and is made of 78% nitrogen, 21% oxygen and 1% of a mix of others. It is the standard base of measurement of atmopsheric density/pressure on varying altitudes and other planets.

The crust is a solid rock that floats above the liquid mantle. It is made up of large tectonic plates that seprate or impact one another, creating trenches and mountains.

The mantle is a large layer of liquid rock 2,900km in size. Convection currents move the molten rock and material around (And that's where volcanoes obtain their characteristic red-hot, molten flowing rock).


Then there's the outher core. It is a 2,300 kilometer liquid ocean of iron and cobalt. Convection currents exist here too as in the mantle, though more frequent.

Ultimately there's the inner core. It's a dense, hot solid ball of iron and nickel. At least 5,400+ Celsius, it is hotter than the surface of the Sun and well, our gravity. Oh, and it is also super dense and has a high pressure.

User Jonathan Benn
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