Is cooking a steak a chemical change?

Chemical change is a change that is not reversible easily. It is shown by a change in color, or gas given off or a precipitate formed.
Cooking steak does change the color. A chemical change occurred, you can not uncook it. There has been a permanent change to the proteins.
Physical changes are changes in size, shape, state or solution.
no, after cooking it is still a steaj, therefore the change is physical
Yes, it is. You are breaking down enzymes and proteins and rearranging them so that you can eat it. Physical changes are reversible under the right conditions. Chemical changes are not - can you turn a cooked steak into a raw one?
yep, it is a chemical change.

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