How long does chalk take to form?
Correspondingly, how long does it take to make chalk?
Next, mix equal parts cornstarch and water in a bowl, and add food coloring if you want to make colored chalk. Use a spoon to transfer the chalk mixture into the tube, then cover the whole tube with wax paper. Let the chalk dry for 12 hours, then remove it from the molds and have fun with your new creation!
In this way, how chalk is formed?
The chemical composition of chalk is calcium carbonate, with minor amounts of silt and clay. It is formed in the sea by sub-microscopic plankton, which fall to the sea floor and are then consolidated and compressed during diagenesis into chalk rock.
Chalk, in both its natural and man-made form, is white in colour and is considered to be a fairly soft solid. Naturally, chalk comes from the ground where it is found as a porous (can hold water) sedimentary rock. It is a form of limestone and is composed of the mineral calcite.