Which of the following is a physical change? (1 point)
sawing a piece of wood in half
burning a piece of wood
rust forming on an iron fence
a copper roof changing color from red to green

Question

Which of the following is a physical change?  (1 point)
sawing a piece of wood in half
burning a piece of wood
rust forming on an iron fence
a copper roof changing color from red to green

anonymous · Answer

@crazychickloves, wow sorry someone is just now getting to this question, but if you look at all these, fire is chemical, rust forming is also chemical, and copper changing colors is called by chemical due to like rain or something. Which leaves you with sawing a piece of wood in half, first because you're doing it yourself and you changed the natural state