An example of a physical change is the process of tempering steel to form a knife blade.
Many physical changes also involve the rearrangement of atoms most noticeably in the formation of crystals.
Some substances such as iodine and carbon dioxide go directly from solid to gas in a process called sublimation.
One familiar example is the mixture of fine sand with water used to make sandcastles.
Neither the sand on its own nor the water on its own will make a sand-castle but by using physical properties of surface tension, the mixture behaves in a different way.
Others such as mixtures or volatile liquids such as low molecular weight alcohols, can be separated by fractional distillation.