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Dissolving sugar in water is a physical change because if you were to dissolve the sugar in water and then let the water evaporate, the sugar would still be left. All of the components that you started with are still there, even if you can't see them. A physical change is a change of matter that does not alter the chemical properties of that matter. A chemical change is when bonds are broken and new bonds are being formed between different atoms. Chemical Change: Baking soda and vinegar fizzing and creating bubbles Physical Change: When water freezes, it doesn't create a new substance. Ice is still H₂O just in a solid form.