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Iron meteorites are the closest thing to earths core.
The crust is made of basalt.

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Asthenosphere- Layer below the lithosphere, made of a portion of the upper mantle; the asthenosphere can flow
Core- innermost, densest layer of a celestial body

Crust- Rocky outer layer of the of the earth’s surface

mantle- Middle layer of earth; made of hot rock

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atmosphere- A mixture of gases that surround a planet such as earth
Biosphere- All living organisms on earth
Hydrosphere- All the water on earth
Lithosphere- Solid, brittle rock; Earth's outermost rocky layer that makes up the surface

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inner layers

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Earth's Interior Isn't Quite What We Thought It Was | TNTM

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outer layers

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Four Spheres Part 1 (Geo and Bio): Crash Course Kids #6.1

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Meteorite- A fragment of planetary bodies such as moons, planets, asteroids, and comets, that strike earth
Seismic waves- Waves of energy that come from earthquakes

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Earthquakes are caused when the tectonic plates shift. Waves sent up from them help us learn about Earth's layers.

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earth is always changing because the outer layers are interacting and altering each other.

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Crust- 1%
Mantle- 68%
Core- 31%

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Earth has different layers. There is the atmosphere, the biosphere, the hydrosphere, and the lithosphere. The lithosphere is the crust and part of the mantle. The crust, the mantle, and the inner and outer core are all layers in earth's surface. Scientists learn about these layers by using seismic waves from earthquakes and meteorites. There are 2 types of waves that come from seismic waves, body waves and surface waves. In between the lithosphere and the core there is the asthenosphere which can flow and bend.