7. (D) What are the two ways in which the physical state of matter can be
changed?
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Answer:
temperature and pressure
Explanation:
increasing temp and lowering pressure can make a solid to liquid and a liquid to gaseous state...
similarly decreasing temp and increasing pressure can make a gas to liquid and a liquid to solid..
to understand better think about intermolecular force and space and u will get ur respective states of matter..
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