Common Physical Changes. Texture. Color. Temperature. Shape. Change of State.
Physical Properties. Luster. Malleability. Ability to be drawn into a thin wire. Density. Viscosity.
Common Chemical Changes. Change in Temperature. Change in Color. Noticeable Odor. Formation of a Precipitate.
Physical changes can be reversed usually by heating or cooling a substance, without any chemical bonds being broken.
Chemical changes CANNOT be reversed due too the chemicals being broken and forming something new.
Btw, I know you didn't need chemical change, but I put it in there anyway. Hope it helps.
c)as speed changes, wavelength and frequency change.