Used mainly in scientific contexts, specifically geology, not in everyday conversation. Scientists classify gneiss as a metamorphic rock.
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Physical Change
Refers to actual changes in material, not metaphorical or abstract changes. Marble is formed from limestone through metamorphic processes.
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No Biological Use
Don't confuse with biological transformations, which use the word 'metamorphosis'. Unlike a caterpillar's change, quartzite's metamorphic change does not involve biology.