Final project ideas:
1. Effect of vinegar on pearls -
Chemical composition of pearls?
What in it reacts with the acetic acid?

2. Importance of olfactory senses in tasting.
There are only four basic tastes. Foods with the same taste can have a different flavour based on their smell. [Wikipedia]
[This could be an interesting topic because it is controversial - I read Luca Turin's book on smell - he has a TED talk also JCB]

Five Physical Properties of Monosodium Glutamate (MSG):

1. Melting Point
2. Solubility