Week 5 was Sea week so we investigated an important property of sea water, its salinity. First we (carefully) dropped an egg into tap water. Then we took it out, stirred in 20gms of salt and dropped the egg back into the water. In some cases the egg floated up halfway in the water. After that, we removed the egg again but this time we stirred in 80gms of salt to beaker. This time most people found that their egg floated on the top of the water.
We recorded our results so we could recall what happened and compare our findings to those of others, using our diagrams as evidence.
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