One of my online friends' interviewed PJ Harvey.
Harvey said that she decided to name the album after this song because of the simple, consonant-defined heft of the words white chalk. ""I felt like it reflected the music on the record, which I think is quite simple," she said. "And also, it conjures up many images for me, everything from childhood and blackboards to the actual quality of it as a substance. It's something that's hundreds of years old but can be erased in a second. I like that sort of timeless idea about it. But mostly it's the sound of the words. They're very succinct and simple, with hard consonants. I like the way it falls off the tongue."