Answer :

Tearing paper

Breaking your pencil

Chopping down a tree

Breaking Mom's favorite vase ... I did that one before :)

Those are some examples of physical changes happening around us  

At school: Children learning and growing, time passing during the day, the vibrations of sound. 
At Home: Dinner being made, a new baby coming home
In Nature: A tree falling down, flowers growing, a bird laying an egg

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