Science, asked by sonamtyagi86, 3 days ago

When your teacher writes with chalk stick soon the the chalk stick convert into Chalk dust why ?do you think that chalk stick and chalk dust are the same substance? what change is this ? ​

Answers

Answered by ErwinSmithAOT
0

Answer:

Because of friction. Chalk stick/dust are the same.

Explanation:

Friction puts pressure on the chalk, which is soft, and so the chalk starts to grind and that makes dust. Chalk sticks are the same as Chalk dust. Since no new substance is formed, it will be a reversible/physical change.

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