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Galley Hill Primary School, Hemel Hempstead. Galley Hill rated GOOD by Ofsted. 'Value of the Month - ' PATIENCE'

Science

What if...

  • How would polar bears and penguins live?
  • How could you make a cool drink without ice?
  • What would happen to all the snow in winter?
  • What would happen to the sea levels?

 

Background science

Freezing is the term used to describe a liquid changing state into a solid when you cool it. It’s a reversible change, so if you apply heat to something frozen it will melt back into a liquid. Water usually freezes at 0°C, but its freezing point can drop below zero if it contains substances such as salt or alcohol. Seawater freezes at around -2°C, while antifreeze can stop the water in a car’s radiator from freezing even at -30°C!

Glacial ice (that is glaciers, ice caps, ice bergs and the sheets of ice that cover arctic regions) holds a vast amount of the world’s fresh water,  while salt water is found in the seas and oceans.

 

Take it further

What are freezing and melting? - BBC Bitesize video, information and quiz.

The water cycle - National Geographic Kids explains how the Earth has been recycling water for over 4 billion years!

 

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