1. Atmosphere: The gaseous layer surrounding the Earth, composed primarily of nitrogen and oxygen.
2. Hydrosphere: All the water on Earth, including oceans, lakes, rivers, ice, and groundwater.
3. Crust: The thin, outermost layer of the Earth, composed of solid rock. There are two types:
* Continental crust: Thicker and less dense, making up the continents.
* Oceanic crust: Thinner and denser, forming the ocean floor.
4. Mantle: The thickest layer of the Earth, composed of mostly solid rock that can flow very slowly over long periods.
5. Outer Core: A liquid layer of iron and nickel, generating Earth's magnetic field.
6. Inner Core: A solid ball of iron and nickel, extremely hot and under immense pressure.
Let me know if you'd like more details about any of these layers!