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
phisiological change,its not a physical or chemical change
Physical. Melting is always a physical change.
No
It is true.
Burning is always a chemical change. Melting is a physical change.
Burnig things is always a chemical change.
The flash of a camera is a physical change, not a chemical change. A physical change is a change in the form of a substance without changing its chemical composition. In the case of a camera flash, electrical energy is converted into light energy, which is a physical process that does not alter the chemical makeup of the components involved.
Scrubbing the floor is a physical change because the appearance or state of the floor is altered without changing the chemical composition of the materials involved.
Cutting hair is a physical change because the chemical composition of the hair remains the same before and after it is cut. The change is only in the physical appearance of the hair, not in its chemical structure.
Burning wax is a chemical change. If you are burning something, it will always be a chemical change.