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Which is an example of a different substance being formed?
A glass breaking
B metal melting
C water freezing
D wood burning


Sagot :

Definitely D: wood burning. Broken glass is still a glass. Frozen water can be melted again into water. The same, but in the opposite way, is with the melted metal. But once wood is burned into ashes (which is this new substance) there is irreversible, both physical and chemical change.