It depends on what you mean by “these”. If you are referring to the sticks of chalk used for writing or drawing, then yes, we can say they are chalk, or at least they are made of a similar substance. However, if you are referring to the type of soft white rock that is composed mostly of tiny fragments of the calcite shells or skeletons of plankton, then no, we cannot say they are chalk, because they are not natural rocks, but manufactured products. Chalk is a fine-textured, earthy type of limestone distinguished by its light color, softness, and high porosity. Chalk is also the name of a series of strata consisting mainly of chalk. I hope this helps. 😊
chalk = Kreide
Chalk in Sanskrit can be called "चाक" (chaak).
NO
In general, you may say 'chouku,' or when referring to blackboard chalk, you may say 'hakuboku,' written (in the same order) チョーク 白墨
tableau
Chalk is "चूर्णक" (Churnaka) and duster is "मुष्टिका" (Mushtika) in Sanskrit.
craie brosses
Assuming you mean chalk, as in what you write with on a blackboard, then the two ways are "la tiza" and "el gis." El gis is used in Mexico.
Like coyote with 'ch' as in chalk.
De la craie (fem.)
It says something about a pledge
chalk