KWUN TONG GOVERNMENT SECONDARY SCHOOL
Yearly Examination 2016-2017
Integrated Science
Class : S.1 ( ) Max. Mark : 100
Name : ______Date : 15-6-2017
Class No.: ______Time : 8:45 – 9:45
Answer all of the questions on the answer sheet provided.
(A) Multiple Choice (20 marks)
1. A car is moving. In which of the following cases does it have the highest kinetic energy?
A. It moves at 50km/h. B. It moves at 60km/h.
C. It moves at 70km/h. D. It moves at 80km/h.
2. 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.
3. Which of the following energy conversions take place in the generation of electricity by burning fossil fuels?
A. Chemical energy stored in fuels à heat and kinetic energy of the steam
à kinetic energy of the turbine à electrical energy
B. Chemical energy stored in fuels à heat energy of the turbine
à heat energy of the steam à electrical energy
C. Potential and chemical energy stored in fuels à heat and kinetic energy of the steam
à kinetic energy of the turbine à electrical energy
D. Chemical energy stored in fuels à light energy given out by fuels
à heat and kinetic energy of steam à kinetic energy of the turbine à electrical energy
4. What is the intermediate form of energy when a torch is turned on?
A. Kinetic energy B. Potential energy C. Electrical energy D. Chemical energy
5. The photo below shows a dolphin jumping out of the water to hit a ball.
Does the potential energy (P.E.) of the dolphin increase or decrease when the dolphin jumps out of the water and when it falls into the water?
A. / P.E. increases / P.E. increases
B. / P.E. increases / P.E. decreases
C. / P.E. decreases / P.E. increases
D. / P.E. decreases / P.E. decreases
6. In which of the following set-ups is apparatus X used as a motor?
A. / / B. /C. / / D. /
7. Which of the following is the energy conversion involved in running?
A. Potential energy in food ® kinetic energy of the body
B. Chemical energy in food ® kinetic energy of the body
C. Potential energy in food ® chemical energy of the body
D. Chemical energy in food ® potential energy of the body
8. There are many methods of coffee-brewing. Coffee filters are used in preparing drip brew coffee
(滴漏咖啡).
Which of the following statements about the coffee filter is correct?
A. It prevents micro-organisms from passing to the coffee.
B. It prevents soluble impurities from passing to the coffee.
C. It prevents ground coffee beans from passing to the coffee.
D. It prevents water from passing to the coffee.
9. In some countries, seawater is processed into fresh water in desalination plants (海水化淡廠) to increase the supply of drinking water. In some desalination plants, seawater is changed into steam during the production process.
Which of the following is the main method being used in the desalination plants mentioned above?
A. Crystallization B. Distillation C. Sedimentation D. Filtration
10. Tertiary treatment (三級處理) of sewage is carried out in Ngong Ping Sewage Treatment Works (昂坪污水處理廠). The sewage is treated by filtration and ultra-violet light. The treated water can be used for flushing toilets and raising fish.
Which of the following are the purposes of the water treatment methods used in Ngong Ping Sewage Treatment Works?
Filtration / Ultra-violet lightA. / Remove soluble impurities / Remove the bad smell of sewage
B. / Remove soluble impurities / Control the alkalinity of sewage
C. / Remove fine suspended solids / Remove minerals
D. / Remove fine suspended solids / Kill micro-organisms
11. Jim is heating some distilled water on a hot water bath.
What can be observed after the distilled water is heated for a few minutes?
A. The amount of water on the watch glass increases. B. White liquid is left on the watch glass.
C. White solids are left on the watch glass. D. Nothing is left on the watch glass.
12. Which of the following students correctly explain(s) why natural water should be treated before being distributed to us?
Katy: Natural water may contain impurities that are not visible to the naked eye.
Peter: Tap water has to be boiled to make it safe for drinking.
Joe: Micro-organisms in water can cause disease.
Sandy: Chlorine is added to our drinking water in water treatment works.
A. Joe B. Katy and Peter C. Katy and Joe D. Peter and Sandy
13. On Earth, fresh water is mainly found in
(1) / lakes. (2) rivers (3) oceans (4) polar regionsA. (1) and (2) only B. (1), (2) and (4) only C. (3) and (4) only D. (1), (2), (3) and (4)
14. What is the major drinking water source in Hong Kong?
A. Rain water in Hong Kong B. Distillation of seawater
C. Water imported from Dong Jiang D. Water imported from Macau
15. The particles which make up the golden ring are
(1) moving all the time. (2) close together. (3) made up of two kinds of atoms.
A. (1) and (2) only B. (1) and (3) only C. (2) and (3) only D. (1), (2) and (3)
16. The melting points and boiling points of four substances (P, Q, R and S) are shown in the table below.
Substance / Melting point (°C) / Boiling point (°C)P / – 30 / 258
Q / – 78 / 112
R / – 59 / 153
S / 37 / 370
Which of the following statements about substances P, Q, R and S is/are correct?
(1) Only substance P is in gas state at 258 °C.
(2) At – 50 °C, both substances Q and R are in liquid state.
(3) Only substance S is in solid state at room temperature.
A. (3) only B. (1) and (2) only C. (2) and (3) only D. (1), (2) and (3)
17. When a drop of red ink is added to a beaker of water, some red colour spreads through the water. This shows that
A. different substances are made up of different particles.
B. there are spaces between particles.
C. particles are tiny.
D. particles are moving in all directions all the time.
18. We can find water droplets on the surface of a glass of cold drink. Which of the following correctly explains this phenomenon?
A. The air temperature is lower than the temperature of the drink.
B. Water vapour in the air condenses on the cold surfaces of the glass.
C. The ice in the drink melts and forms water droplets on the glass.
D. The water in the drink condenses to form water droplets on the glass.
19. The diagrams below show the arrangement of particles of two substances inside two containers.
A student transfers the substances to new containers. Which of the following diagrams about the arrangement of the particles of the two substances in the new containers is INCORRECT?
A. / / B. /C. / / D. /
20. The table below shows the densities of five substances.
Substance / Density (g/cm3)Wood / 0.9
Water / 1.0
Plastic (PVC) / 1.3
Glass / 2.5
Iron / 7.9
Which of the following objects floats in water?
A. A pair of wooden chopsticks B. A PVC ball C. A test tube D. An iron chain
(B) True or False Statements (10 marks)
Write 'T' for a true statement and 'F' for a false one.
1. Turbines in steam engines are turned by hot water.
2. In winter, we rub our hands to keep warm because kinetic energy is changed to heat energy.
3. Electrical energy is stored in dry cells.
4. In distillation set-up, hot water enters the condenser from below.
5. Water is the major component of urine and sweat.
6. Diarrhoea may be caused by drinking natural water directly.
7. Light and air are examples of matter.
8. Dry ice can change from solid to gas directly.
9. Robert Brown discovered the random motion of particles by observing pollen grains moving in water.
10. A golden ring sinks in water while a foam floats since heavier objects always sink in water.
(C) Fill in the blanks (20 marks)
1. If a drum (鼓) is hit, (a) ______energy is changed to (b)______energy.
2. When a magnesium ribbon is burnt, its chemical energy is changed to (c) ______energy and (d)______energy.
3. The (e) ______is a device that changes kinetic energy to electrical energy. It can be found in power station.
4. (f) ______is the most common energy source used at home today because it is clean and convenient.
5. A steam engine consists of two main parts: the boiler and the (g) ______.
6. We can observe (h) ______such as E-coli in water using a microscope. This impurity can be killed by (i) ______which has a pungent smell in water.
7. In sedimentation, (j) ______is added to make the solid impurities settle more quickly.
8. Upon filtration, some solid impurities are left on the filter. They are called (k) ______. The liquid which passes through filter is called (l) ______.
9. (m) ______impurities are not removed in the water treatment process.
10. (n) ______is added to water to prevent tooth decay.
11. Liquids have fixed (o)______but no fixed (p)______.
12. Boiling is the process in which a substance changes from (q) ______into (r) ______state.
13. Particles that make up matter are (s) ______. We cannot see them with our naked eyes.
14. If the particles of a substance vibrate but do not move freely, the substance is in the (t) ______state.
(D) Short Questions (50 marks)
1. (a) Write down the energy conversion in the following cases.
(i) a pendulum is released and falls to its lowest position. (2 marks)
(ii) gas explosion (煤氣爆炸) (3 marks)
(b) Which of the above case is uncontrolled energy conversion, (i) or (ii)? (1 mark)
[Total: 6 marks]
2. Tom made a ‘rubber band airplane’ as shown below. When the propeller is turned, the rubber band winds up. When the propeller is released, the rubber band unwinds and the propeller turns in the opposite direction. The airplane then flies with a push.
Tom wants to know if the thickness of the rubber band affects how far the airplane flies. He fixes rubber bands of different thickness onto the airplane and then flies the airplane. He records the results in the table below.
Distance travelled by the airplane (m)/ 1st / 2nd / 3rd / Average
Thin / 1.38 / 1.43 / 1.42 / (i)
Medium / 1.74 / 1.69 / 1.73 / (ii)
Thick / 2.23 / 2.10 / 2.12 / (iii)
(a) Calculate the average distance travelled by the airplane. (3 marks)
(b) State the form of energy that is stored in the rubber band when the rubber band winds up.
(1 mark)
(c) State ONE factor that should be kept unchanged in the three runs to make the test fair.
(1 mark)
(d) What can Tom conclude from the above results? (2 marks)
[Total: 7 marks]
3. The government is promoting the use of electric cars in Hong Kong. Electric cars are driven by electric motors powered by rechargeable batteries.
(a) Fill in the energy conversions that occur when an electric car moves. (3 marks)
i
energy stored in the batteries of the car / / ii
energy supplied by the batteries of the car / motor /
iii
energy of the car
(b) With reference to the effect on road-side air quality, suggest why the government promotes the use of electric cars in Hong Kong. (2 marks)
(c) Suggest ONE reason why electric cars are not popular in Hong Kong today. (2 marks)
[Total: 7 marks]
4. In 2015, drinking water in some local public housing estates and schools were found to contain excess lead. The government provided some affected people with bottled distilled water.
(a) Give ONE harmful effect of lead on our health. (1 mark)
(b) Many people boil water to make it safer to drink. Can boiling remove the lead in water? Explain your answer. (3 marks)
(c) Is distilled water safe to drink? Explain it by completing the paragraph below. (3 marks)
Distilled water is safe to drink. During distillation, water boils and changes to i .
It then cools down and ii to form liquid water, which contains no iii .
[Total: 7 marks]
5. In Hong Kong, the Water Supplies Department (WSD) developed a biosensing alert system (生物感應預警系統) to monitor the quality of Dongjiang (東江) water. The system makes use of light-emitting bacteria (發光菌) and zebrafish as the test agents. This system can screen over 1000 harmful substances in water in an hour at a low cost.
(a) What is the use of this biosensing alert system? (1 mark)
(b) State what can be observed in the system if the water being tested is polluted. (2 marks)
(c) State ONE advantage of using this system. (1 mark)
(d) Mary used filter paper to purify tap water and then drink it. Is it safe to drink? Explain your answer. (3 marks)
[Total: 7 marks]
6. The table below shows the mass, volume and density of some substances.
Substance / Mass (g) / Volume (cm3) / Density (g/cm3)Liquid A / (i) / 4 / 12.5
Liquid B / (ii) / 20 / 0.7
Liquid C / 10 / 10 / 1.0
Solid X / 64 / 8 / (iii)
Solid Y / 10.8 / 12 / 0.9
(a) Complete the table on the answer sheet. (3 marks)
(b) (i) Equal volume of liquids A, B and C are poured into a beaker. The three liquids do not mix with each other. Label the diagram on the answer sheet to show the positions of the liquids. (3 marks)
(ii) A cube of substance X and a cube of substance Y are dropped into the beaker in (c)(i).