Using a microcontroller with compatible temperature sensors and output devices, students create a program that will detect temperature changes through a soil sample. They will then calculate the rate at which heat flows through the soil. Materials Microcontroller (Arduino, Parallax, Cubit, Teensy, Pinguino, etc.) One temperature sensor, compatible with the microcontroller Output device capable of indicating a change in temperature, such as a speaker, buzzer, light or display (7-segment, matrix,