The Earth is composed of several layers, each with distinct temperatures. From the coolest to the warmest, the layers are:
1. **Crust**: The outermost layer, the crust, is the coolest part of the Earth. Its temperature ranges from about 0°C (32°F) at the surface to approximately 400°C (752°F) at the boundary with the mantle.
2. **Mantle**: Below the crust lies the mantle, which is divided into the upper and lower mantle. The temperature in the upper mantle ranges from about 500°C (932°F) to 900°C (1652°F), while the lower mantle can reach temperatures up to 3,700°C (6,692°F).
3. **Outer Core**: The outer core is composed of molten iron and nickel. Temperatures here range from about 4,000°C (7,232°F) to 5,000°C (9,032°F).
4. **Inner Core**: The innermost layer, the inner core, is the hottest part of the Earth. Despite the immense pressure, the temperature here ranges from about 5,000°C (9,032°F) to 7,000°C (12,632°F).
These layers illustrate the Earth’s internal structure, with temperatures increasing as you move from the surface towards the core.