Why do women have shriller voices than men? plus 9 more videos.. #aumsum #kids #science

Frequency - Why do women have shriller voices than men? Diffusion - Why can we smell hot food from a distance? Density - Why does an iron nail float on mercury and sink in water? Earthing - Why do buildings have lightning rods? Speed of Sound - Why does sound travel faster in summer than in winter? Ignition Temperature - Why does a match light when you strike it? Wavelength - Why red is used as a danger signal? Good and Bad conductors of Heat - Why are two thin blankets warmer than one thick blanket? Comets - Why do comets have tails? Lateral Inversion - Why is ambulance written in reverse?