1: States of matter changes are different from chemical changes because _______.
only states of matter changes require heat or cold to occur.
in a state of matter change, a liquid that has become a solid can easily revert to a liquid while with a chemical change, it is very difficult or impossible to change back
Water evaporates rapidly.
B and C
2: If heat causes a liquid, such as a raw egg, to become a solid, we know that _______.
a phase change has taken place.
the boiling point has been reached.
a chemical change has taken place.
the liquid has frozen.
3: If a phase change occurs because of heat, it can be reversed by _______.
boiling.
cooling.
subliming.
melting.
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