Yes, in the form of Calcium Sulphate
magic rainbow pony
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.
Nature's chalk is limestone--hard. Blackboard chalk is soft--gypsum.
The chalk will be ground into chalk dust by the pebbles.
No. Chalk is mostly calcium compounds.
magic rainbow pony
Primarily calcium carbonate, derived from the skeletons of very small ancient marine organisms.chalk is made up of calcium powder and calcium carbonate."Blackboard and sidewalk chalk were originally made from the sedimentary rock of the same name; a form of soft limestone. Chalk, composed principally of calcium carbonate (CaCO3), formed underwater by slow accumulation and compression of the calcite shells of single-celledcoccolithophores."
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
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