Question

Rubbing chalk on a blackboard is a chemical change

Answer 1

Answer:

It is a chemical change because the gas is a chemical and a liquid. ... As you clean the chalkboard with the eraser, are you causing a physical change or a chemical change? Explain your answer. You are causing a physical change to the chalk by rubbing it off and it entering the air in a smoke/gas form.

Explanation:

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Answer 2

Answer:

It is a chemical change because the gas is a chemical and a liquid. As you clean the chalkboard with the eraser, are you causing a physical change or a chemical change? Explain your answer. You are causing a physical change to the chalk by rubbing it off and it entering the air in a smoke/gas form.

Explanation:

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