Chalk FAQs:

Q: Is chalk well jointed it can hold a large volume of ground water?

A: Yes, and providing a natural reservoir that releases water slowly through dry seasons.

Q: Was chalk used to mark the boundary lines of the playing field or court?

A: Yes.

Q: Is chalk mined from chalk deposits both above ground and underground?

A: Yes.

Q: Is chalk traditionally a hard chalk used to make temporary markings on cloth?

A: Yes, and mainly by tailors.

Q: Is chalk chalk prepared with a carefully controlled grain size?

A: Yes, for very fine polishing of metals.

Q: Was chalk also traditionally used in recreation?

A: Yes.

Q: Was chalk cut into blocks and used as ashlar?

A: Yes, or loose chalk was rammed into blocks and laid in mortar.

Q: Is chalk a source of quicklime by thermal decomposition?

A: Yes, or slaked lime following quenching of quicklime with water.

Q: Is chalk used for raising pH in soils with high acidity?

A: Yes.

Q: Was chalk one of the earliest rocks made up of microscopic particles to be studied under the microscope?

A: Yes, when it was found to be composed almost entirely of coccoliths.

Q: Is chalk the lowest cost to produce, and thus widely used in the developing world, calcium-based chalk can be made where the crumbling particles are larger and thus produce less dust, and is marketed as "dustless chalk"?

A: Yes, Colored chalks, pastel chalks, and sidewalk chalk , used to draw on sidewalks, streets, and driveways, are primarily made out of gypsum.

Q: Is chalk calcium carbonate?

A: Yes, and with minor amounts of silt and clay.