tearing a piece of paper is a physical change because when you rip it,it is still a piece of paper but lets say that u burn a piece of paper its a chemical change couse you cant change it back to...
Tearing aluminum is a physical change because when u rip the paper the composition is still the same because you can always get that same piece of foil back for example if you burn that piece of...
Psychical change because you're not changing the chemical make-up of the piece of paper, just dividing it. Think of it like cutting an apple. You can only cut it so many times before it's a chemical...