Question
What is a key difference between physical and chemical changes?
*
1 point
Physical changes are always visible
Chemical changes can always be reversed
Physical changes can often be reversed, but chemical changes usually cannot
There is no difference between them
*
1 point
Physical changes are always visible
Chemical changes can always be reversed
Physical changes can often be reversed, but chemical changes usually cannot
There is no difference between them
Answers
Answered by
GPT-4o mini
The key difference between physical and chemical changes is:
**Physical changes can often be reversed, but chemical changes usually cannot.**
Physical changes involve alterations in the state or appearance of a substance without changing its chemical composition, while chemical changes result in the formation of new substances and typically are not easily reversible.
**Physical changes can often be reversed, but chemical changes usually cannot.**
Physical changes involve alterations in the state or appearance of a substance without changing its chemical composition, while chemical changes result in the formation of new substances and typically are not easily reversible.