Directions: Read the following sentences carefully. Write True on the blank if the statement is correct and False if it is wrong.

________16. When heat is applied to liquid water it solidifies.

________17. When a piece of paper is burned it loses its original properties.

________18. Physical change occurs when oxygen is used up in burning stick.

________19. Fire goes out in a lighted candle when there is no oxygen.

________20. Oxygen combines with the materials inside the body and undergoes a chemical change.​