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Answer the following in brief:
 
Define the term irreversible change.
Answer variants:
same material
burning
cooking
permanent
texture
new substance
state
original form
broken material
An irreversible change is a change in which a substance or object cannot be changed back to its
or
. In this type of change, a
may be formed, and the change is usually
. Irreversible changes often occur during
,
, rusting, or breaking. For example, cooked food cannot be changed back into raw food again.