SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are both processes that physically change a substance.
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They are both processes that chemically change a substance.
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They are both processes where heat is released by a substance.
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They are both processes where heat is absorbed by a substance.
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Detailed explanation-1: -Both melting and freezing are phase transition processes and cause change in state or phase of the substance. Both are physical change, so no new substance formation occurs. Both changes are reversible. Both greatly depend on external pressure on the substance.
Detailed explanation-2: -Melting and freezing refer to the changes in state which occur when the solid and liquid states interchange. Melting occurs when a solid is heated and turns to a liquid and freezing occurs when a liquid is cooled and turns to a solid.
Detailed explanation-3: -A physical change occurs whenever only the physical structure of a substance changes. The most common physical changes are changes in states of matter, such as the melting process and freezing process. Melting is the process of turning a solid into a liquid.
Detailed explanation-4: -Freezing and melting are both changes in state, which occur when a solid or liquid’s states interchange.
Detailed explanation-5: -Therefore, when solids change into a liquid called melting, and when liquid changes into solid ice called freezing.