Question

F. Answer the following questions in brief.

1. You blow dry your wet hair. How can you reverse this change?
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Answer 1

Answer:

by washing the hairs again

Explanation:

It is not a physical change

Answer 2

We can reverse the change by washing the hair so that it becomes wet again.

• Blowing dry wet hair is an example of physical change because no new substance is formed and it can be reversed by reversing the situation.
• The material pertaining to the physical change is structurally the same before and after the change. Kinds of some physical changes are texture, contour, temperature, and a change in the state of matter. A change in the texture of a material is a change in the manner it feels.
• Physical changes are temporary and normally reversible. During a physical change, just the physical properties of the substances are altered. The chemical composition is not influenced by physical changes.

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