Yes, the Earth’s mantle is indeed hotter than the crust. The temperature of the mantle ranges from about 500 to 4,000 degrees Celsius (932 to 7,232 degrees Fahrenheit) as you move deeper into the Earth, while the crust, which is the outermost layer of the Earth, has much lower temperatures.
The Earth’s crust is relatively cool, with temperatures that can vary widely depending on geographic location and depth, typically ranging from about 0 degrees Celsius (32 degrees Fahrenheit) near the surface to around 1,000 degrees Celsius (1,832 degrees Fahrenheit) closer to the mantle.
The significant temperature difference is due to the way heat is distributed within the Earth. The heat from the core is conducted upwards, warming the mantle more than the crust. The mantle is composed of solid rock that flows slowly over time; this movement is what drives plate tectonics. Understanding these temperature differences helps us comprehend various geological processes, including volcanic activity and the formation of mountains.