Energy is always involved.
When a chemical change takes place, the chemical structure of particles involved changes (i.e. one or more new substances are formed). In a physical change, the physical state of the particles involved changes (e.g. a solid melts and becomes a liquid). The chemical structure of the particles does not change, and no new substance is formed.
Physical - there are no chemicals involved
No, all changes of state are physical, never chemical. It always can be reversed by temperature change only and no other compound are involved.
phisiological change,its not a physical or chemical change
Physical. Melting is always a physical change.
No, it's a chemical change because chemical reactions are involved.
Burning is always a chemical change.
It is true.
No
Burning is always a chemical change. Melting is a physical change.
Burnig things is always a chemical change.
Color is a physical change always.