Because melting is a change of state: from solid to liquid.
The change in which no new kinds of matter are formed but the size, shape or state of the matter may change is known as a physical change.
a change in size, shape or the state of matter is a physical change. True for A+.
Matter can go through change of state. This is a physical change from gas>liquid>solid. So, matter can has a physical change.
a physical change is when the shape/ state of matter is changed and no new matter is produced
When a matter changes from a gas to a liquid it is called condensation.
Phase change - melting, evaporation, Nuclear fusion or fission.
Plasma
Yes. In nuclear processes like fusion and fission, some matter is converted into energy.
Matter causes a change in state
The state of matter remain unchanged.
The change in which no new kinds of matter are formed but the size, shape or state of the matter may change is known as a physical change.
no physical change does not change matter
no physical change does not change matter
The amount of energy needed to change the "state of matter" is termed as "latent heat". This is not same for vapourisation (liquid to vapour) or for fusion (solid to liquid). For example, latent of fusion is 79.7 cal whereas latent heat for vapourisation is 541 calories. The latent depends on how closely the atoms and molecules in the matter are closely packed.
Change of state.
state of matter
The state of matter remain unchanged.