We have been learning all about teeth in third 🦷 We did an experiment using eggs, because egg shells and teeth are both made of calcium compounds that react similarly to acid (and none of the children fancied having vinegar in their mouth for 3 days in a row).
We popped in our eggs and off we went!
We filled the glasses with coke, water, vinegar and coffee to see the impact they had on the egg shells. We put two eggs into the coffee, one covered in toothpaste, to see if it would make a difference.
The results were:
•Water- no change
•Coffee (without toothpaste) brown with dots.
•Coffee with toothpaste- slightly less brown/no dots.
•Vinegar- the shell dissolved but the egg membrane remained in tact (before it was handled roughly and sadly burst before photographic evidence)
Fourth class started the year with a great STEM challenge called ‘Design a Bridge’.
During this challenge the children tested different bridge models to see which was the strongest. Below you will see the pictures of flat bridges, arched bridges, walled bridges and corrugated bridges.
We made this a fair test by all using the same type and amount of books. We also kept the distance between the books at 15cm.
Our results found the walled bridge was strong, the arched bridge was stronger and the corrugated bridge was the strongest.
First class were constructing boats as part of a STEM challenge this week. To begin we decided to test different items to see if they would float or sink. Here are some pictures that show our test:
After this first class started to make a plan in groups of three to decide what materials they would use to build their boats.
The boat had to hold a trailer and stay afloat for 10 seconds. All of the boats were successful and passed the STEM challenge. Take a look at us designing and some of our finished products.
John Treanor, a building services engineer, came into 6th yesterday to teach the children all about motors. He is also a past pupil of Peters which was lovely. He knew they had a big interest in electric scooters and bikes, so they all made their own motor! We used magnets, batteries and a bolt. They really enjoyed it. Thanks a mil for coming in!