Imagine a presentation that covers electromagnetic waves, electromagnetic radiation, radio waves, microwaves, the visible light spectrum, UV, X-ray, and gamma rays. Here's one. Packed with facts and colorful illustrations, 11-slide...

Scientists used flame tests to identify elements long before the invention of emission spectroscopy. Young chemists observe a flame test of five metal cations in the fourth instructional activity of an 11-part series. Individuals then...

Lucianne Walkowicz shows us the waves just beyond our perception: microwaves, radio waves, x-rays and more. [5:58]