if the divergence continues what could probably happen to the size of the space between the splitting crusts will it widen or stay the same

It will widen.

Explanation:

Divergence is the process of plates moving in the opposite direction and way from each other as a result the new crust is formed on the seafloor and hence younger rocks can be seen near the mid-oceanic ridge and older rocks at the margins of the coasts. The splitting of the crust can be seen from the example of Atlantic ocean that in S shape and expanding at a continuous rate.

Maybe on the physical part? i dunno i just guessed plus i really need the points