F2 IS QZ 04 anwers

Marks: =       /22 =    %

1st Term QZ 04 Submission date：_____________ Name：______________________ Class & no.：2 _________(     )

7.2

Word Translation (7 marks)

i    Write down the English terms of the following Chinese terms:

	Chinese term	English term
1	火三角	Fire triangle
2	燃料	Burning
3	熄滅	Go out
4	高溫	High temperature
5	必須條件	Necessary conditions
6	氧	Oxygen
7	發生反應	React

Fill in the Blanks (13 marks)

1      Burning is a chemical process involving fuel and oxygen.

2      When fuels burn in air, they react with oxygen and produce carbon dioxide and water. Light / heat energy and heat / light energy are given out.

3      The word equation of burning is:

                Fuel + oxygen ---------------à carbon dioxide + water + energy

4     Fuel, oxygen and a sufficiently high temperature are the necessary conditions of burning. They form the fire triangle. That means fire will go out if any one of them is removed.

Multiple Choice (2 marks)

1.      Water and carbon dioxide can be used to put out a fire. Which of the following correctly shows what they remove from the fire triangle?

	Water	Carbon dioxide
A.	Fuel	Oxygen
B.	Oxygen	Fuel
C.	Temperature	Oxygen
D.	Fuel	Temperature

5.     We should NOT use water to put out certain kinds of fires. What are they?

(I)      Burning oil

(II)    A fire caused by leakage of electricity

(III)   A hill fire

A.   (I) and (II) only     B.    (I) and (III) only    C.    (II) and (III) only   D.    (I), (II) and (III)

Challenging Questions (Bonus 2 marks)

Explain how we can put out the fire of burning oil.

We can use a pan cover / fire blanket to cover the fire (1) because this can stop the supply of oxygen to burning (1).