Invisible Ink

As part of science lessons, pupils used lemon juice to make their own invisible ink. After writing their messages and drying the ‘ink’ they then saw the chemical reaction taking place after heating it up to reveal the message.

Pupils also experienced how liquid turns to gas and travels through the air. Perfume was sprayed at one end of the classroom and pupils timed how long it took for the scent to reach the other end – 30 secs.

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