Saturday, 13 May 2017

Our Welsh Project Day 3

Off we went to Wales for the third day of our project.
This week we explored colour.
We thought about what it would be like if we lived in a black, white and grey world and how strange that would be.

With year 3 we first learnt a new skill - how to use a pipette to carefully get just one drop at a time where we wanted it to go - not an easy skill.

Then we experimented mixing primary colours to see what other colours we could make. We made a recording sheet to help with remembering what we had done and then began to explore lots of other colour combinations.
After mixing colours we looked at splitting colours up using chromatography.

First we used washable pens on filter paper with water which showed us that lots of colours are mixtures and will split into different and surprising colours as they spread along the paper.
Then we thought about the topic for the term which is China and how China has 5 primary colours - red, yellow, green, white and black. Each colour means something different, represents a different part of China and has good luck, happiness or other fortune connected with it.

Finally we used Sharpie pens to create a design on a small square of material tightly stretched over a beaker. We couldn't use water to spread these colours because Sharpies are permanent  so we carefully used a few drops of alcohol which made incredible rainbows. Everyone used their new pipette skills to drop the alcohol onto the material. It evaporated very quickly so the material was dry almost straight away. Well done year 3 on some great pipette skills!

Year 4 started by exploring chromatography using washable felt pens and water before brushing up on how to use a pipette. They then drew some super designs onto white material stretched over a beaker and dropped alcohol onto the centre to make stunning patterns as the colour spread.

We then looked at how nature uses colour to attract a mate, as camouflage so it doesn't get eaten or as a predator to hide so it can catch lunch or to warn because it is poisonous.

We looked in a bit more detail at the 3 primary colours we use compared to the Chinese 5 and how colours have special significance to Chinese people.
We also were bamboozled by some amazing optical illusions.

Finally we gathered round to watch a demonstration of a homemade lava lamp which we lit up using a small torch. I think there will be quite a few lava lamps happening at home this week!

Next week we will be looking at how scientists use  colour to tell whether a liquid is acid or alkali.

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