 A physical change is when an object’s appearance is different, but still has the same substance.

 There are many different physical changes. An example would be if you took a piece of wood and carved it into a baseball bat. The wood looks different, but is still wood, just in a different shape.

 Physical changes in solids are a bit different. Not all solids can be turned into liquid or gas.  If the solid is ice or metal, it can be heated and melted into a liquid.  Once the solid is a liquid, it can sometimes be turned into a gas when it is heated.

 If there is a physical change in a liquid, it can turn into either a solid or gas.  When water freezes it turns into ice(a solid), and when water is being boiled it turns into steam(a gas).

 If gas gets very cold, it turns into a liquid.  When the gas is a liquid, it can freeze into a solid.  An example would be when carbon dioxide(a gas) is frozen, it turns into dry ice, a solid.