physical vs chemical

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  • brushing my teeth is an example of chemical change because using friction and the chemicals in toothpaste and the water takes the germs off your teeth
  • After i ate my breakfast my food by being broken down and dissolved by my acid in my stomach this is an example of a chemical change cause it is being changed into a new substance!
  • it was friday and they school was popping Popcorn popping is a physical change because when popcorn pops when water contained in the kernel is heated and turns to steam. When the pressure builds up in the kernel, it explodes into popcorn, the starch and the water contained in the kernel comes together as it cools into a solid
  • in class cutting paper is a physical change because When you cut a piece of paper, there will be smaller pieces of paper but you're not changing it just changing it in size and shape
  • a gravestone being worn away and weathered, is an example of chemical change because carbonation is caused by acids in water reacting with a degrading rock. causing it to degrade
  • a tree falling is an example of a physical change because it can be changed back and Even after cutting the tree it remains a tree that's why it is a physical change.
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