Question

1.Can charcoal brought back to wood? 2.they say that physical change can be brought back to original state . What in the case of physical change in human body??

Answer 1

1. No.
2. Moving our lips

Explanation:

1. Charcoal can't be brought back to wood as it's a chemical change in which a new product has been formed. We know that they are irreversible.
2. Moving our lips is a physical change because physical change means something which brings a change in its own original state and can be reversed back. We can change the position of lips from their original place by their movement and can make them move back to their original place by moving lips reversely.