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Which of the following is a correct example of physical change?1. Burning a piece of wood2. Rusting of an object's surface3. Cutting up a piece of paper4. Changing the chemical identity of a substance

Sagot :

Let's talk about physical and chemical changes:

A Physical change is a type of change where the physical properties of matter change. A change of state of matter, change in colour, odour, solubility, etc. all are examples of physical change. During a physical change, neither the composition nor the chemical nature of matter is changed.

A chemical change is a change of materials into another, new materials with different properties and one or more than one new substances are formed. It results when a substance combines with another to form a new substance (synthesis or either decomposes to form more substances).

According to the definitions given, then from the options given the correct example of physical change is 3. Cutting up a piece of paper.