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…
What is Nuclear energy Nuclear energy is the most powerful form of energy in the universe. What is nuclear fission and nuclear fusion There are two ways of producing it…
How do we get energy from food? We use energy all the time, even when we are asleep. We need energy for our body to work. We need energy to…
How can you tell a fresh egg from a rotten one? It's easy. Put them in a bowl of water. The fresh egg will sink but the rotten one will…
Pour a teaspoonful of salt into a glass of water.Now stir it and watch the salt slowly disappear from sight.It is dissolving in the water.How do you know the salt…
When you pump up your bicycle tires or football, you are making use of compressed air. Inside a bicycle pump is a small device called a valve. A valve allows…
Look out of your window. Is the air moving? It is probably moving enough to make the branches on the trees sway slightly. The weight of this air pressing down…
At the refinery, thousands of tons of oil are turned into useful substances every day. What is Crude Oil? Crude oil is a mixture of many different chemicals called hydrocarbons. …
What is Electroplating? If you pass electricity through a solution, you can cause a chemical reaction. New substances are produced where the electric current enters and leaves the solution—at the…
Have you ever hunted for buried treasure? You could just start digging anywhere and hope that you would find something. Or you could use a metal detector.