Workbook Answers 7.2

A

1.     True

2.     True

3.     False

4.     False

5.     False

B

1.     D

2.     C

3.     D

4.     C

5.     A

6.     D

C

1.     (a)    fuel

        (b)    oxygen

        (c)    a sufficiently high temperature

        (d)   fire triangle

2.     (a)    carbon dioxide

        (b)    water

        (c)    heat

        (d)   light

D

1.     B,C,F,G and H

2.     (a)    (i)     Fuel

Oxygen

Temperature

                (ii)    It shows the three necessary conditions for burning to take place.

(b)    (i)     The pan cover should be used. By covering the pan, it stops the supply of oxygen to the burning oil.

                (ii)    Burning oil floats on water and spreads the fire together with water.