easily reversed

does not form new products

mostly shows a change in state

difficult to reverse

produces new forms

often produces heat, light, or sound

a strand of hair cut into smaller pieces

a wood block is shaped into a round block

an iron bar rusts

a piece of copper is pulled into a long thin wire

a burning log becomes a pile of black ash

a match burns

a green coating forms on an old penny

a tray of water freezes

leaves fall to the ground and begin to rot

ice changes into liquid water

Which of the following is a physical change

You cut a piece of fruit, leave it on the counter and it turns brown

A necklace tarnishes (changes color)

melting butter in a pan

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