Physical change is when the object remains but may be in a different state.
Example:
if a glass of ice was left on your bench it would melt into a glass of water. This is a physical change. This is able to be reversed by pouring the glass of water back in the ice tray and putting it back into the freezer, to turn into ice.
Example:
If you had a log that needed to be cut for your fire you can get an axe and cut it in half. That is a physical change because your log went from being a whole log to 2 halfs.
From the video that I watched, the man had a plain piece of paper which he changed into a paper aeroplane.this was the first physical change he made. He then put the paper plane into a shredder. This was the second physical change. This is physical change because even when it was an aeroplane or shredded into pieces it was still paper. When he burnt the paper it turned into ash, this was no longer physical change, it was chemical change as it was no longer paper. He then made himself a salad where he chopped, grated, crushed, ground, ripped and mashed his vegetables to make his salad. These are all examples of physical change.
