Question

19. Fill in the blanks with the correct words.

(c). Burning of wood is an example of a _________ (physical/chemical) change.

Answer 1

• A change where no new substances are formed but there is a change in the physical appearance of the substance is called a physical change.
• Any change that involves a chemical reaction where one or more chemical substances react and result in the formation of one or more new and different chemical substances is called a chemical change.
• Burning wood is an example of a chemical change in which wood is changed into carbon dioxide, water vapor, and ash in the presence of heat and oxygen.
• New substances are formed.

Burning of wood is an example of a chemical change.