The pupils in Room 15 were learning about acids and bases and were testing different substances.
We used litmus paper to figure out if a substance was an acid or a base and we used the colour scale to find out its pH level.
The pupils in Room 15 were learning about acids and bases and were testing different substances.
We used litmus paper to figure out if a substance was an acid or a base and we used the colour scale to find out its pH level.