How has it changed?-Class III

 Students used a piece of paper and crumpled it up. Students were asked "How has it changed?" (Its shape has changed, it is now crumpled.)  if it has changed in any other way. Is it still paper? Students were aksed if you can change the paper back to the way it was originally. Now the students teared  the paper into pieces. Can it be changed back?(Yes, if you stick the bits together ). The students concluded that we change the shape of an object or material the change is called a physical change. The material is still the same, but it has a different shape or form.