Because it's harder to write with something in a square shape of a triangle shape.
Remember that.
Any, the answer depends on what the experiment is about.
they used either the rain or chalk erasers because they only had chalk.
Chalk lines are to establish a continuous straight line for things like laying tile or setting bricks.
Chalk
The image is of someone keeping score on a blackboard. If you "chalk it up" to something, you acknowledge that whatever it was caused the result.You often hear this phrase as "Chalk it up to experience," which means that whatever happened was not the result you wanted, but you have learned something from it.
cylinder
A rectangular prism or cuboid.
look like a cylinder, cirgarette, stick. feel powdery, smooth, and hard
chalk
colored chalk sidewalk chalk dustless chalk
rubber is harder than chalk !
45 years ago i was working for a company and had to use and move big oxygen and nitrous oxide cylinders around. when a cylinder was empty i used to write with chalk MT on the cylinder .... was this the start of text talk ?
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