Ready-made science week

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By Ian CrawfordYear 2 teacher and subject leader for ICT

Inspire your class during National Science and Engineering Week with these fun experiments linked to the theme of ‘Change’!

Ready-made science week - drip

Monday

Chemical change

Main activity

  • Show the class a shiny new copper coin and an older dull and dirty-looking copper coin.
  • Place the dull coin in a beaker of pure lemon juice for about five minutes.
  • Remove the coin. What has changed?
  • The coin is dull because oxygen in the air slowly changes the shiny copper surface to a dull copper oxide. The lemon juice contains a weak acid which reacts with the copper oxide and removes it, changing the surface to shiny copper again.
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