In this task, you are given a paragraph, and your task is to construct a question from the given passage. Construct question in such a way that (i) it is well explained in the paragraph, (ii) the words may/may not be present in the paragraph, (iii) it should start with what/how/describe. Avoid creating a question that (i) is just relevant to one or two sentences, and (ii) not relevant to passage. 

When water freezes it becomes 10% bigger, or takes up 10% more space. As water expands it puts great pressure on the walls of anything containing it, including any rocks which happen to be surrounding it. 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. Clay expends when wet like ice does. This causes rock to break apart. Some plants like mosses and lichens are capable of growing without soil on bare rock. 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. 
How does weathering cause rocks to break apart?

A star burns in space. Eventually it burns all its hydrogen. Becomes a red giant. Once the red giant burns itself out. The core of the star collapses. The gasses will start to disperse. Only the core is left. A white dwarf has been formed. 
How is a white dwarf star formed?

A butterfly lays an egg. A larvae matures inside of the egg. The caterpillar hatches from the egg. The caterpillar eats and grows. The caterpillar spins a coccoon around itself and forms into a pupa. The butterfly forms inside of the coccoon. The mature butterfly emerges from the coccoon. The butterfly mates. The female butterfly lays eggs. 

Describe the lifecycle of a butterfly