Biology

Just add sunlight and water to demonstrate a chemical reaction caused by ultraviolet light. At the same time you can create a photographic work of art! Put one or more objects on a sheet of this photosensitive paper and expose it to sunlight for seve...

These UV-detecting beads are a real attention getter-driving home the point that this invisible light is a real thing causing real changes. The hole in the ozone layer and the possible damage to living organisms by increased UV radiation has received...