A lava lamp (or Astro lamp) is a decorative novelty item, invented in 1963 by British accountant Edward Craven Walker, the founder of the British lighting company Mathmos. The lamp consists of a bolus of a special coloured wax mixture inside a glass vessel, the remainder of which contains clear or translucent liquid, the vessel…
Preface Electricity can be made when certain chemicals react together. We usually use chemicals to make electricity for example on a flashlight, a clock battery or sometimes a car battery. There are cars that run on electricity! Devices that store electricity are called batteries. Instead electricity can also be used to produce chemical changes or…