Exploratorium
Hot Spot
Not only does a concave mirror focus light waves, it can also concentrate infrared radiation into a hot spot. If you have a small electric heater and such a mirror, demonstrate this for your physical science class.
Curated OER
Global Warming: Life in a Greenhouse
High schoolers examine the evidence that scientists have used to support the existence of global warming and the greenhouse effect. How the concepts have been developed and evaluated form the focus of this lesson.
Curated OER
Liquid Crystal IR Detector
Middle schoolers experiment with one method of detecting infrared radiation. They simulate the detection of infrared radiation using a liquid crystal sheet.