The hypothesis is that Regular Coke and Diet Coke will both sink in water.

You will fill an aquarium tank with water, place a can of regular Coke and a can of Diet Coke in the water, and observe whether the cans float or sink. You will also add 1 kg of sugar to the water and observe the cans again.

You will need an empty aquarium tank, a pail of tap water, a can of regular Coke, a can of Diet Coke, and 1 kg of sugar.

The results show that Diet Coke will float in tap water whereas Regular Coke will sink in it. However, when 1 kilogram of sugar is added to the water, both the Regular Coke and Diet Coke cans start to float in the water.

This science project is interesting because it shows how the density of an object can affect whether it will sink or float in a medium.

Variations: 1. Repeat the experiment using turpentine or alcohol instead of water. 2. Try to compare the results by using different types of soda cans.

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