Do All Martians Have Powers?

Like the Green Martians, White Martians have numerous superhuman powers, including great strength/speed, flight, invisibility, telepathy, shape-changing, phase-shifting (sometimes called variable density) which allows them to be either invulnerably tough or completely immaterial, and "Martian vision", but they also ...

Can white Martians turn into green Martians?

Though M'gann M'orzz is a white Martian on Earth-38, she has yet to appear as one on Earth-Prime, transforming into her green Martian form in battle.

Are Martians stronger than kryptonians?

Martians have a larger array of powers but Kryptonians are stronger -I think- and have heat vision. The Amazons Attack fight went pretty even. Miss Martian was able to absorb and dodge blows with her shapeshifting and intangibility/invisibility, but it's limited and could be caught unawares.