Mrs Ware asked us what we thought might happen if we put some coins and a tooth in coke for a few days.
We know about only changing one variable in an experiment so we made this plan.
We used what we knew about coins, teeth and coke to make some hypothesis (guesses) then we took some 'before' pictures.
Then we put them all in coke for a day. The next day we took them out and looked at them, took more photos and made some observations in our writing books.
We saw that the coins were shinier and the tooth looked all brown. The next day this is what they looked like.
We concluded that the acid in the coke had eaten through the enamel coating on the tooth, and then the food colouring in the coke had dyed it brown.
The acid had also eaten away all the dirt and grime on the coins making them nice and shiny again.
Hopefully this experiment should put your child off drinking quite so much coke this summer ;)
No comments:
Post a Comment