A transformer can make an electric current smaller or larger. As an electric current flows along the wires from a power station, it loses energy. A large current loses much…
You can make a bulb light up by using two wires to join it to a battery. The bulb lights up because an electric current is flowing through it. The battery produces…
Do you know how water gets to the faucets on your kitchen sink?It comes through pipes.Pipes let water flow in the direction we want it to go.How do we make…
Did you know that light rays can cut through a steel plate? What sort of light can do this?The answer is laser light.A laser can produce a thin but very powerful…
How does a light bulb work - for kids?Have you ever looked closely at an ordinary electric light bulb? Hold it carefully while you do so. Inside, you may see…
Most electrical appliances have wires attached to them.The wires carry an electric current around a complete pathway called an electric circuit.Some appliances need more electric current than others before they…
Dead animals and plants rot and decay. In swampy areas, for example, dead plants fall into the water. As they decay, they give off gas. Scientists call this biogas. Biogas…
The wind has been a source of energy for thousands of years. Before the development of the steam engine, most ships relied on wind power to fill their sails and…
More energy reaches earth from the sun than could be converted by millions of power stations. The sun’s energy costs nothing, but how can we use it?We can use the…
Did you know that a power station can produce electricity without burning coal or oil, and without using nuclear fuel? How? A power station can turn the potential energy of…