It's an old recipe for putty, especially glazing putty.
A mixture of sugar and chalk is heterogeneous.
chalk is a compound
Chalk is not a mixture it is a chemical compound called Calcium carbonate.
chalk is a compound
it is a mixture of white paint and white chalk
Chalk is Calcium Carbonate, aka CaCO3, so it's only one substance.
The chalk will be ground into chalk dust by the pebbles.
This is a suspension.
No, it's not. Pastel chalk or soft pastel is easier to blend and draw with because it is softer, hence the name, soft pastel. Soft pastels are made of ground pigments, gum tragacanth, and a filler. Chalk simply has a dye added to its mixture and is harder. Unlike pastels, chalk is made up of gum Arabic which washes off with water.
compound
You can add water to this mixture, which will dissolve the salt but not the chalk. Decant the water, then boil it away, and you will be left with salt.Salt is much more soluble in water than chalk is.
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