KWUN TONG GOVERNMENT SECONDARY SCHOOL
Half Yearly Examination, 2001-2002
Integrated Science
Class : S.1 ( ) Max. Mark : 100
Name : ______Date : 14 -1-2002
Class No.: ______Time : 8:45-9:45am
ANSWER ALL THE QUESTIONS ON THE ANSWER SHEET PROVIDED
(A) Multiple-choice questions: Choose the best answer. (20%)
1 What is the temperature shown by the thermometer?
A 35 oC
B 37 oC
C 39 oC
D 41 oC
2 Which of the following is not a unit of time?
A Second
B Minute
C Hour
D Light year
3 What is the apparatus shown in the diagram below?
A Test-tube rack
B Tripod and wire gauze
C Test-tube holder
D Stand and clamp
4 If we break a beaker, we must
A report to our classmates.
B report to the school office.
C report to the teacher.
D not tell anyone.
5 When a lamp is turned on, what form(s) of energy does it give out?
I Light energy
II Heat energy
III Electrical energy
A I only
B III only
C I and II only
D All of them
6
When the ball is placed on the table above the ground, which form of energy does it have?
A Kinetic energy
B Potential energy
C Sound energy
D Electrical energy
7 What is the energy change in playing piano?
A kinetic energy sound energy
B potential energy kinetic energy
C chemical energy sound energy
D sound energy kinetic energy
8 Which of the following energy changes takes place when we rub our hands to make them warm?
A kinetic energy potential energy
B potential energy chemical energy
C chemical energy sound energy
D kinetic energy heat energy
9 An electric fan can change electrical energy to kinetic energy. It is an
A energy producer.
B energy converter.
C energy consumer.
D energy exchanger.
10 What is the mains voltage in Hong Kong?
A 110V
B 120V
C 220V
D 240V
11 The followings are the tips for using electricity safely. Which one is FALSE?
A Use two-pin plugs.
B Check all electrical installations regularly.
C Don’t touch electrical sockets with wet hands.
D Don’t overload adaptor.
12 A television is marked 800W. We watch TV for 3 hours. What is the total amount of electrical amount of electrical energy transferred?
A 24 kWh
B 2.4 kWh
C 144 kWh
D 14.4 kWh
13 Which of the following should not be used for putting out an electrical fire?
A a blanket
B sand
C water
D carbon dioxide fire extinguisher
14 When the air hole of a Bunsen burner is closed, the flame is
A luminous.
B blue.
C steady.
D very hot.
15
Which of the following is the most suitable conclusion for this experiment?
A The glass tube can be burnt.
B The inner cone contains unburnt gas.
C The inner cone is very hot.
D The inner cone contains cold gas.
16 A non-luminous flame should not be left unattended because
A it is blue in colour.
B it is very hot and almost invisible.
C it is unsteady.
D the air hole is open.
17
Which of the following is the most suitable conclusion for this experiment?
A. The stone is smaller than the displacement can.
B. The stone sinks to the bottom of water.
C. The stone is insoluble in water.
D. The volume of the stone is 15 cm3.
18 Which of the following instruments can be used to listen to the heart rate?
A. endoscope
B. microscope
C. stethoscope
D. telescope
19 Which scientist is studying a plant?
A biologist
B astronomer
C geoloist
D astronaut
20 Which of the following sentences does not suggest what science does to us?
A Science helps us to tell the fortune of our lives.
B Science helps us to understand how the nature works.
C Science helps us to improve our daily life.
D Science helps us to make new things.
(B) True or False Statements (20%)
Write 'T' for a true statement and 'F' for a false one.
1 All accidents, no matter how minor they are, must be reported to your teacher.
2 Physics is the study of substances which make up the earth and living things.
3 Eating and drinking are not allowed in the laboratory.
4 During exercise, the pulse rate increases and the heart rate decreases.
5 When an object is broken down into small pieces, its total volume increases.
6 The energy stored in a battery is electrical energy.
7 Energy can be changed from one form to another.
8 We can produce energy by using energy converters.
9 Hong Kong Electric Co. Ltd is responsible for the generation , transmission and distribution of electricity on HK Island, Ap Lei Chau and Lamma Island.
10 We can save electricity by using fans instead of air-conditioner.
(C) Fill in the blanks with suitable words. (20%)
1 The HKSAR government usually raises the national flag on the first day of October. During the ceremony of raising flag, (a) energy is changed into
(b) energy.
2 In an investigation, the factors that will be kept unchanged are called
(c)______variables.
3 Our heart rate is the same as our (d)______rate.
4 The blue flame of a Bunsen burner is also called a (e)______flame.
5 (f)______and (g)______are the liquids commonly used in thermometers.
6 The sun gives out (h)______and (i)______energy.
7 A motor is a device which can also act as a (j)______.
8 A dry cell changes (k)______energy into electrical energy.
9 An electric bell changes electrical energy into (l)______energy.
10 Domestic electricity is measured in (m)______.
11 (n) ______is the amount of electrical energy transferred per second.
12 The workplace of a scientist is called (o) ______.
13 You have to wear (p) ______while heating or mixing substances.
14 (q)______means you can only change the variables that you are investigating in each set of experiment.
15 We use a (r) ______to measure weight.
16 At the end of the experiment, you can (s)______with your classmates and draw a (t) ______.
(D) Short questions: Answer the following questions. (40%)
1 You are provided with a can and a measuring cylinder. How would you make use of them to find out the volume of the doll? (8%)
2 Draw a series of labeled diagrams to show the mixing of solution A and B. (6%)
[Materials: Solution A, Solution B, water, 3 test-tubes, 1 dropper and
1 beaker]
3 John found that he slid down one slide faster than another slide in the playground. He was curious why the time to slide down could be different. He thought the time of sliding down might be affected by the angle of the board to the ground. The greater angle to the ground, the shorter time it would take to slide down. He decided to do an experiment to test whether his idea is right or wrong.
a What is John's observation? (1%)
b What is John's question? (1%)
c What is John's hypothesis? (2%)
The experiment of John is shown in the diagram below.
He measured the time taken for the block to slide down. The results of his experiment is shown in the table:
Angle (degrees) / Time taken to reach the ground (seconds)10 / 3.4
20 / 2.5
30 / 2.0
40 / 1.7
50 / 1.5
d What should he keep the same in the experiment? (2%)
e What conclusion can you draw from the result? (2%)
4 Why are the following steps dangerous? (4%)
a)
b)
5 Describe the energy change in each of the following conditions: (8%)
(a)
waterfall
(b)
radio
(c)
tennis player
(d)
letting go of the bucket
6 Read the following electric bill carefully and answer the questions.
a) How many ‘units’ of electrical energy were consumed in these two months? (2%)
b) What is the cost? (2%)
c) According to the histogram, less electrical energy was consumed in winter. Why? (2%)
END OF PAPER
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