What makes a good handkerchief? Thursday 18th October 2018
Today we had a special visitor to help up with our science investigation week. Dr Lizzie came to our school to do an experiment on what made the best handkerchief!
First, we had to think about the job a handkerchief needed to do and what properties it needed. We used key words including materials, absorbency and strength. We used magnifying glasses to look closely at the different materials and then we had to make a prediction! Which material would absorb the water the best? Our materials included:
We carefully tested how absorbent they were by dripping on water using a pipette. Then we tested their strength by building towers of coins. Finally, we considered which would be softest on our nose. The teams came up with different results. Some thought the kitchen towel worked best as it was soft, strong, absorbent and you could throw it away. Other teams thought the cotton was best as it could be washed and re-used so that was better for the environment! Felt was quite good too, but this was also quite expensive. There was a lot of interesting scientific conversations!
Is spaghetti just for eating?
The children were given the task of creating a chair for tedding to sit on and a table strong enough to balance a cup of water on.
They could use the following to make their models
The children discovered that they had to use lots of spaghetti to make the table and chair legs strong enough to support the weight of the teddy bear. Many children chose to make a cube shape as they quickly realised they needed a flat surface to sit teddy on. They also discovered that triangles were very strong shapes and good for adding support.
Science Oxford Visit Friday 19th October 2018
Today we were delighted to welcome Ian Snell from Science Oxford. He ran a whole day of workshops for all the children.
Morning session (Willow and Cherry Classes: Making Slime!
The children were investigating properties of materials. First we talked about materials and what they were used for – how different properties are used for different purposes. Can you imagine a chair made of jelly? Or a table made of cake?
To illustrate the different properties we played a game: bounce or break? When Ian dropped an object from a height what would happen? Everyone made a prediction first and then we tested it.
The children then learnt that they were going to make a new material. This new material would have different properties to the individual materials used (water, PVA glue, powdered paint, glitter and borax). Everyone listened very carefully and followed Ian’s instructions. The mixture started off very runny but with a lot of stirring we made something that was stretchy, bouncy and sticky!
Science Oxford: Afternoon Session: K-nex Crazy Friday 19th October 2018
In the afternoon, the children had to put their engineering skills to the test. They were shown two models of cars – each powered by an elastic band. In mixed year groups, the children had to create their own elastic band powered vehicle. There was a hum of activity as the children talked about their possible designs and tried different variations to see what would work. Sometimes, just a small adjustment had to be made whilst others found they needed to undertake quite major work.
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