In Science we have
been learning about teeth and the digestive system.
We carried out an
investigation into what substances were most harmful to teeth using boiled eggs
(because the shell is similar to tooth enamel).
We covered five eggs in toothpaste and put each one in either water, coke
(diet and normal), milk or vinegar. Then we put them in the stock cupboard and left them for a week!
When we looked at
them we found that the vinegar did the most damage (the shell became almost
paper-like!) and the water did no damage at all.
We also made a
model of the digestive system from plastic bags, tights and a cup! We followed the progress of food (a banana
and a Weetabix) from entering the mouth all the way to being deposited in the
toilet (plastic cup!). There was lots of
squashing, squeezing and giggling!
