EARTH SCIENCE
MAGNETISM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
True because it can’t be reversed
|
|
|
False because no new substance has been formed
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -Cutting your hair is a physical change. A physical change happens when a substance is altered somehow but remains the same substance. It is not chemically changed.
Detailed explanation-2: -Physical changes are changes in the physical properties of substances. No new substances are formed in these changes. These changes may be reversible. In chemical changes new substances are produced.
Detailed explanation-3: -Explanation: Cutting of hair is probably a physical change .. Because: No new substance is formed.
Detailed explanation-4: -Therefore, a change in which no new substance is formed is known as physical change.
Detailed explanation-5: -The graying of hair is a chemical change as it involves changes in constitution of hair.