1. Atmosphere: This is the layer of gases that surrounds the Earth.
2. Hydrosphere: This includes all of the Earth's water, such as oceans, lakes, rivers, and groundwater.
3. Crust: This is the thin, solid, rocky outer layer of the Earth. It's divided into oceanic crust (thinner and denser) and continental crust (thicker and less dense).
4. Mantle: This is the thickest layer of the Earth, made up of mostly solid rock that can flow very slowly over long periods.
5. Outer Core: This is a liquid layer composed primarily of iron and nickel. It generates Earth's magnetic field.
6. Inner Core: This is a solid sphere of iron and nickel at the Earth's center. It's incredibly hot and under immense pressure.
