Remember: A chemical change can't go back to the original state once the change occurs.
Shown in the green slides are examples of Chemical changes. On this slide the chemical change being shown is the burning of wood.
Another example of a chemical change is cooking an egg.
Another example of a chemical change is baking a cake.
A candle is both an example of a chemical change and a physical change. The part of the candle that is a chemically changed is the reaction of the wick burning giving off the scent of the candle(top). The part of the candle that is a physical change is the melting of the wax(bottom).
Shown in the yellow slides are examples of physical changes. Here the physical change being shown is ice turning into water.
Remember: A physical change is when the reaction is reversible.
Another example of a physical change is crumpling paper.
Another example of a physical change is slicing bread.
When the wax is melting the candle is turning from a solid to a liquid, therefor shrinking in size.