A cross-sectional diagram of a volcano with a red and yellow color scheme. The diagram shows the volcano's internal structure with layers of rock and magma. The top layer is red, representing the volcano's surface, while the bottom layer is yellow, representing the magma chamber. The sides of the diagram have measurements in centimeters and degrees Celsius. The diagram is labeled with '300\xc2\xb0C' at the bottom left and '700\xc2\xb0C' at the top right.