Question

4.
Define a physical change and list its
characteristics. Give three examples of
physical changes.​

Answer 1

Answer:

A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

Answer 2

Answer:

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Everything around us undergoes certain changes. Changes can be either physical or chemical. The term ‘matter’ refers to anything that has mass and occupies space. It is made up of tiny particles and has physical and chemical properties.

Physical Change

When matter changes its observable properties, we can say it has undergone a physical change.

Example-

When the shape, size, appearance or state, of a substance is altered, but its chemical composition remains same a physical change of matter takes place. No new substance is formed. It is usually a change, which is reversible that is, by reversing the process the original substance can be obtained. During melting of ice, it converts into water. It is a physical change as composition is not changed.