• How is plastic made?
  Most plastics are made from ethene, one of the products of cracked ...

• What is a carbon chain?
  Carbon atoms often link together like the links of a chain to form ...

• What are aromatics?
  Benzene is a clear liquid organic chemical found in coal tar. It can ...

• What’s the difference between mass and weight?
  Mass is the amount of matter in an object. It is the same wherever ...

• What is the carbon cycle?
  Carbon circulates like this: animals breathe out carbon as carbon ...

• What is power?
  Power is the rate at which work is done - a high-powered engine is an ...

• What are carbohydrates?
  Carbohydrates are chemicals made only of carbon, hydrogen and oxygen ...

• What is gravity?
  Gravity is the invisible force of attraction between every bit of ...

• What was Newton’s breakthrough?
  Sir Isaac Newton's breakthrough, in 1665, was to realize that all ...

• What did Galileo do on the Tower of Pisa?
  The Italian scientist and astronomer Galileo Galilei (1564-1642) is ...