Practicing NEW ACT with old ACT materials?

The 2017 act science section is different from previous years, is it logical to still practice for the science with old tests? How different are they from one another? I ask because I don’t have many materials left to practice with.

BUMMP

Anyone please answer, I really don’t know how else to prepare for the science section

This should be posted under the ACT prep forum. But yes it is important that you use up to date material.