Gunpowder is an explosive material made of sulfur, charcoal, and potassium nitrate. It originated in China around 800 AD and has spread around the world. Gunpowder is used as a propellant in firearms, for mining explosives, military bombs, fireworks, and igniting matches. It ignites very quickly and can reach temperatures of 800 degrees Celsius. Today, gunpowder is still used in ammunition, fireworks, and some household items like matches.