Question

Give one word or a phrase for each of the following.

3. A change in which no new substances are formed.

Answer 1

• A change in which no new substances are formed is called a physical change.
• For example, the melting of ice is a physical change.
• In all the three forms of water, solid, liquid, and vapor, the composition remains the same.
• The water is made up of 2 atoms of hydrogen and 1 atom of oxygen.
• Thus melting of ice is a physical change, as there is no change in composition.