RAINBOW SCIENCE EXPERIMENT 🌈
What you need:
• 6 containers
• Food colouring - red, yellow, blue
• Water
• Kitchen roll

Instructions:
🟥 In a triangle shape add 1-2 drops of 1 colour so there is 3 separate containers of colour.
🟧Place a strip of kitchen roll or absorbent paper roll between each colour and empty container.
🟨Watch as the colour travels up the kitchen roll into the empty container.
🟩You will find one colour may absorb quicker then others but add a small amount of water to the empty containers and the colours begin to disperse within the water and mix to make a new colour (secondary)

⚗️ The Science.
The motion of the coloured water travelling through the paper towel to the other container is called capillary action. This moving of water (and the dyes dissolved within it) within the porous spaces of materials - In this case the kitchen roll, does not need gravity and in our experiment even goes against gravity by travelling up and over the containers.

Where else does this happen?
If you place a straw in a glass liquid will travel up the above the liquid line in the glass. Sponges use capillary action to soak up moisture as do plants, their root system carries water upwards.

This is an easy, fun experiment which is a visual demonstration to explain primary and secondary colours. Enjoy!

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