• How do nuclear power stations work?
  Inside the reactor there are fuel rods made from pellets of uranium ...

• What does radiation do to you?
  It causes radiation sickness. With a very high dose, the victim dies ...

• How can radioactivity be used to indicate age?
  Radioactivity proceeds at a very steady rate. So by measuring how ...

• Who invented the atomic bomb?
  The first atomic bombs were developed in the USA towards the end of ...

• What is half-life?
  No-one can predict when an atomic nucleus will decay. But scientists ...

• Why do things float?
  When an object is immersed in water, the weight of the object pushes ...

• How do batteries work?
  Batteries create electric currents from the reaction between two ...

• What is electrolysis?
  Electrolysis is a chemical reaction caused when an electric current ...

• What is a mixture?
  Mixtures are substances that contain several chemical elements or ...

• What is a chemical formula?
  A chemical formula is a shorthand way of describing an atom, an ion ...