it is a sedimentary rock
It has mass and volume, the characteristics of matter.
chalk
colored chalk sidewalk chalk dustless chalk
rubber is harder than chalk !
There are a couple of things that make chalk hard. The calcium in chalk is said to make chalk hard.
A collective noun for chalk is a box of chalk.
Nature's chalk is limestone--hard. Blackboard chalk is soft--gypsum.
your an idiot, no a whitle chalk is not longer than aq blue chalk
Christopher Stephen Russell has written: 'The influence of contact area on the yield characteristics of discontinuities within a high porosity chalk'
chalk comes from chalk deposits the white cliffs of dover is one then the grind it into powder then they press it into molds of chalk then they sell it
near a chalk board
Yes, chalk is brittle.