Primary 1-4 experimented with coins last term, we used old coins that Miss Nicholson brought in and put them into different liquids to see which would clean the coins the best.

We had water, fairy liquid, fairy liquid with water, orange juice, lemon juice, coke, vinegar, vinegar and salt, baking powder and water, bicarbonate of soda and water. The vinegar made our classroom stink but it really cleaned the coins, a little too much as it stripped the colour from the coins. The water didn’t really do anything to the coin, the fairy liquid with and without water cleaned it a little but not too much, the coin in the orange juice was surprisingly clean! The lemon juice worked a little, the coke worked really well! We wondered what it does to your insides when you drink it if it could cleaned really dirty coins that well! The baking powder and bicarbonate of soda worked a little too. After a unanimous vote we decided that coke is the best thing to use when cleaning coke so we used this for cleaning the rest of the coins.

Primary 1-4