Question

Which is a characteristic of a physical change? (1 point)

a


The chemical bonds in the substance are unchanged.


b


The change cannot be seen.


c


The molecules all move at the same speed.


d


The substance has reacted with another substance.

Answer 1

the answer would be a.

a chemical change is a change to the chemical makeup of a substance so if the bonds are unchanged it would be a characteristic of a physical change