Check out our channel FunScienceDemos: https://www.youtube.com/user/funsciencedemos
The pointer is pointing at the red line. When Jared applies heat to the rod it expands and pushes the pointer to the green line, and beyond! Check out these links on learningscience.org: https://learningscience.org/psc1apropofmaterials.htm; https://learningscience.org/psc2apropchangmatter.htm to learn more about heat and matter.
Post time: Jun-27-2017