There are not two changes in mattter - six examples are shown below
Gas to liquid e.g. steam to water (condensation)
Liquid to solid e.g. water to ice (freezing)
Solid to liquid e.g. ice to water (melting)
Liquid to gas e.g. water into steam (evaporation/vaporization)
Solid to gas/vapor and the reverse e.g. solid iodine become vapor (sublimation)
evaporation
The study of matter and the changes
The study of properties of matter and how it changes is called chemistry.
Chemistry - the study of the properties of matter and how matter changes
Some laws involved in changes of matter are the Law of Conservation of Matter and the Law of Conservation of Energy. Changes in matter include physical and chemical changes.
Matter changes state because of pressure and temperature.
laws and principle governing changes of matter
no
Changes in the states of matter - or phase changes - do entail changes in volume.
chemistry
nothings its a dumb question
how temperature can bring about changes in the state of matter