Task: Sentence Ordering
Input (English): This causes rock to break apart
Some plants like mosses and lichens are capable of growing without soil on bare rock
As water expands it puts great pressure on the walls of anything containing it, including any rocks which happen to be surrounding it
When they do this their roots penetrate pores and crevices and cause rocks to split apart as the roots force their way down through the rocks
The force of the pressure exerted on the rock surrounding it is enough to wedge the walls of the crack farther apart, thus expanding and deepening the crack
When water freezes it becomes 10% bigger, or takes up 10% more space
Clay expends when wet like ice does
Output (English):   No