Chromatography with Year 2 and 4

This afternoon Year 2 and Year 4 went to the Chemistry lab to see Mr Johnson. He was talking to us about colours in science.

We were adding different liquids together and the colours kept changing! Have a look at our slideshow for the pictures:

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We then got a chance to complete an experiment ourselves to see what colours our favourite felt pens are actually made up of. This is called chromatography. We got felt pens and put dots onto our paper. We then balanced them in a beaker that had a little bit of water in the bottom of it and waited for the water to move up the paper.

We found that the ink was made up of lots of different colours:

  • black – purple, blue, brown and yellow
  • green – yellow and blue,
  • purple – blue and pink,
  • blue – blue,
  • light green – yellow
  • brown – blue, pink and yellow

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Ask us questions about what we’ve done today, we had a great time!