2011 Sec 1 Physics (Term 2) Block Test Practice Questions (by Topic)

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2011 Sec 1 Physics (Term 2) lock Test Practice Questions (by Topic) Name: ( ) Class: 1/ Date: Section (10 marks): Multiple-Choice Questions Choose the best answer and write its letter in the table

1 2011 Sec 1 Physics (Term 2) lock Test Practice Questions (by Topic) Name: ( ) Class: 1/ Date: Section (10 marks): Multiple-Choice Questions Choose the best answer and write its letter in the table provided (in actual T). Section (30 marks): Structured Questions nswer all the questions in the spaces provided. Total = 40 marks Time = 50 min Lab Safety and Use of unsen urner 1 [10/T1/Q1] (year / block test# / question#) Containers holding hazardous substances are labelled with the appropriate warning symbols. Which symbol is used to indicate radioactive substances? C D 2 [10/T1/Q2] Which of the following is the main reason for not allowing students to consume food in the science laboratory? To prevent pests like rats and cockroaches from infesting the science laboratory. To avoid distracting the attention of students. C To avoid ingesting contaminated food. D School rules only allow food to be consumed in the canteen during recess. 3 [10/T1/Q3] The following are steps to ignite a unsen burner to obtain a non-luminous flame, but they are randomly arranged. 1 Close the air holes. 2 Open the air holes. 3 Turn on the gas tap. 4 Click on the trigger of the flame igniter. 5 ring a flame igniter near the top of the barrel. Which of the following shows steps arranged in the correct order? C D

2 1.1 Measurement and Units 1 [10/T1/Q4] The diagram shows part of the vernier and main scales on a pair of vernier calipers. 4 5 cm 0 10 Which reading is correct? 4.23 cm 4.26 cm C 4.28 cm D 4.36 cm 2 [10/T2/Q1] Which of the following gives the correct base quantity and the corresponding unit? ase Quantity ase Unit Length Centimetre Mass Gram C Time Second D Weight Kilogram 3 [10/T2/Q2] The diagram below shows part of the vernier and main scales on a pair of vernier calipers. What is the reading shown? C D 1.42 mm 39.4 mm 38.4 mm 42.4 mm mm 4 [10/T2/Q3] Which of the following correctly matches the physical quantity to be measured with the measuring instrument? Physical Quantity Instrument Circumference of head Ruler Diameter of a coin Vernier calipers C Depth of test-tube Measuring tape D ody temperature Laboratory thermometer 2

3 5 [10/T3/Q1] Which of the following gives the correct base quantity and its corresponding base unit? ase Quantity ase Unit Length Metre Speed Metre per second C Mass Gram D Weight Kilogram 6 [10/T3/Q2] Which of the following readings cannot be obtained from a pair of vernier calipers? C D 1.4 mm mm 3.42 cm 7.10 cm 7 [10/T3/Q3] Which of the following correctly matches the physical quantity to be measured with the measuring instrument? Physical Quantity Instrument Circumference of head Ruler Diameter of a coin Vernier calipers C Depth of test-tube Measuring tape D ody temperature Laboratory thermometer 8 [10/T1/Q11] Convert the following quantities into the respective units. Show your working clearly. [4] (a) mm 2 = m 2 (b) 4.2 h = s 3

4 9 [10/T2/Q11] Convert the following quantities into the respective units. Show your working clearly. (a) mm 3 = m 3 [2] (b) 3.4 h = s [2] 10 [10/T3/Q11] Convert the following quantities into the respective units. Show your working clearly. (a) 5.6 m 3 = mm 3 [2] (b) 0.7 h = s [2] 4

5 1.2 Measurement of rea and Volume 1 [10/T1/Q5] The volume of mercury in the measuring cylinder is cm cm 3 C 7.72 cm 3 D 8.3 cm 3 2 [10/T2/Q4] Which of the following correctly records the volume of mercury as shown on the measuring cylinder? cm cm cm 3 C 12.3 cm 3 D cm

6 2.1 Mass and Density 1 [10/T3/Q4] 2 objects, and are placed in a container containing liquid X as shown in the diagram. Which of following statements must be correct? Liquid X Density of must be equal to the density of liquid X. Density of object must be greater than the density of object. C Density of must be less than the density of liquid X. D Density of object is half the density of object. 2 (a) [10/T1/Q13] Define density. [1] (b) rectangular metal block with sides of length 2.5 cm by 4.8 cm by 9.2 cm has a mass of g. (i) Calculate the volume of the metal block. [1] (ii) Hence, calculate the density of the metal. [2] (iii) The metal block is dropped into a liquid. What further piece of information would you need to decide whether or not this metal block would float or sink in the liquid? [1] 6

7 3 [10/T2/Q13] Fig shows a container filled with three immiscible liquids X, Y and Z. lock was placed into the container and it settles into the position as shown. Liquid X Liquid Y Liquid Z Fig (a) If the density of Liquid X is 0.85 g/cm 3 and the density of Liquid Z is 1.30 g/cm 3, suggest possible values for (i) the density of Liquid Y: [1] (ii) the density of lock : [1] (b) If lock has dimensions 4.5 cm by 4.8 cm by 6.3 cm, calculate (i) the volume of lock, [1] (ii) the mass of lock. [2] 7

8 4 [10/T3/Q13] David tried to determine the density of marbles using the displacement method. He filled a measuring cylinder with water as shown in Fig fter 22 marbles are fully submerged, the water level rose to the level shown in Fig cm 3 50 cm Fig Fig (a) Determine the volume of the 22 marbles. [2] (b) Given the following information: Mass of the empty cylinder = 17.0 g Mass of cylinder filled with water = 86.0 g Mass of 22 marbles with water = g Determine the density of the marbles. [3] 8

9 3.1 Measurement of Time 1 [10/T2/Q5] The periodic time of the pendulum can be increased by C D increasing the angular displacement of the pendulum using a heavier bob using a lighter bob increasing the length of the pendulum 2 [10/T3/Q5] Which of the following statements about the periodic time of a simple pendulum is correct? C D The periodic time decreases as the angular amplitude increases. The periodic time decreases if the pendulum is brought to the moon. The periodic time increases as the mass of the bob increases. The periodic time increases as the length of the pendulum increases. 3 [10/T1/Q12] Fig shows a simple pendulum that oscillates between, and C. Fig C (a) Indicate clearly the length of the pendulum with the letter L on Fig [1] (b) The pendulum takes 45.9 s to make 30 complete oscillations. Calculate (i) the periodic time of the pendulum, and [2] (ii) the frequency of its oscillation. [2] 9

10 (c) State one way of increasing the periodic time of the pendulum. [1] 4 [10/T2/Q12] Fig shows a simple pendulum that oscillates between, and C. C Fig (a) Indicate clearly on Fig. 12.1, the amplitude of the pendulum and label it X. [1] (b) It takes the pendulum 1.2 s to swing from to to C then back to. Calculate (i) the periodic time of the pendulum, and [2] (ii) the frequency of its oscillation. [2] (c) Explain why the first few oscillations are usually not considered when obtaining the periodic time. [1] (d) Suggest one other precaution that can be taken to reduce experimental error. [1] 10

11 5 [10/T3/Q12] Fig shows a simple pendulum that oscillates between, and C. C Fig (a) (b) Indicate clearly on Fig. 12.1, the angular amplitude of the pendulum and label it X. [1] It takes the pendulum 3.0 s to complete 2.5 oscillations. Calculate (i) the time it will take to swing from to. [2] (ii) the frequency of its oscillation. [2] (c) Explain why it is preferable to time for 20 oscillations than just 1 oscillation to obtain the periodic time. [1] (d) Explain why it is necessary to keep the angular displacement small when obtaining the periodic time. [1] 11

12 4.1 Thermometry 1 [10/T1/Q6] temperature rise of 20 o C is the same as a temperature rise of 20 K 253 K C 257 K D 293 K 2 [10/T1/Q7] student puts the bulb of an unmarked mercury thermometer into pure melting ice, then into steam above boiling water and finally into milk. Each time she waits until the mercury level is steady, and then marks the level. The diagram shows the mercury levels measured from the bulb. 5 cm 12 cm 2 cm ice milk steam What is the temperature of the milk? 3 o C 30 o C C 42 o C D 50 o C 3 [10/T2/Q8] new liquid is used for a liquid-in-glass thermometer but laboratory tests reveal that it does not expand uniformly with temperature. What will be the effect of this on the thermometer? It will have a short range. It will have markings that are far apart. C It will have markings that are irregularly spaced. D It will not be responsive for certain temperatures. 4 [10/T3/Q7] Which of the following about the Celsius scale is incorrect? 0 C is equivalent to 273 K. The ice point occurs at 0 C. C change in temperature of 1 C is equivalent to a change of 274 K. D It is not the SI unit for temperature. 12

13 5 [10/T3/Q8] liquid-in-glass thermometer is used to measure a change in temperature. Which property/properties of the liquid change(s)? C D Mass, volume and density. Volume and density only. Mass and density only. Volume only. 6 [10/T2/Q14] n unmarked mercury-in-glass thermometer is being used to measure the temperature of a glass of warm water. When the thermometer was placed in steam and pure melting ice at standard atmospheric pressure, the lengths of mercury threads were 16.0 cm and 2.0 cm respectively. 8.7 cm 16.0 cm 2.0 cm pure melting ice warm water steam (a) Calculate the sensitivity of the thermometer. [2] (b) If the length of the mercury column was 8.7 cm in the warm water, what is the temperature of the warm water? [2] (c) Suggest one way to modify the thermometer to be more responsive. [1] 13

14 7 [10/T3/Q14] n unmarked mercury-in-glass thermometer is being used to measure the temperature of a glass of warm water. When the thermometer was placed in melting ice at standard atmospheric pressure and warm water at 55 C, the lengths of mercury threads were 2.0 cm and 8.5 cm respectively. 8.5 cm? cm 2.0 cm pure melting ice warm water at 55 C steam (a) Calculate the sensitivity of the thermometer. [2] (b) What is the length of the mercury thread when the thermometer is placed in steam at standard atmospheric pressure? [2] 14

15 5.1 Transfer of Thermal Energy 1 [10/T1/Q10] Which of the following statements is not true? Radiation can transfer heat through a vacuum. Poor radiators have white shiny surfaces. C Convection only occurs in liquids. D Good conductors have free electrons to transfer heat. 2 [10/T2/Q9] The diagram shows a metal saucepan containing water being heated on a hot plate. fter some time, the air at point P also becomes hot. metal saucepan P hot plate water What are the main ways by which heat from the hot plate is transferred through the base of the metal saucepan, through the water and through air to point P? Through the base of saucepan Through water Through air Conduction Convection Convection Convection Radiation Convection C Radiation Convection Conduction D Conduction Convection Radiation 3 [10/T3/Q6] Which of the following statements is/are true? (i) For radiation to occur, a vacuum is required (ii) Conduction can take place in solids, liquids and gases (iii) Convection can take place in solids, although it occurs faster in liquids and gases C D (i) and (ii) only. (ii) and (iii) only. (ii) only. None of the above. 15

16 4 [10/T3/Q9] Four bars of the same dimensions are placed with one end in boiling water. The times taken for the temperatures of the other end to increase by 5 C are recorded in the table below. Material of bar Time taken for 5 C rise in temperature/ s luminium 25 Copper 12 Cork 2000 Styrofoam 2800 To make a large metal tank as shown in the diagram that will keep the water warm for a longer time, which materials should be selected for the tank and its insulation? Tank filled with water Tank Insulation luminium Styrofoam luminium Cork C Copper Styrofoam D Copper Cork Insulation 5 [10/T1/Q16] Fig shows a rectangular glass tube containing water. small flame was used to heat the lower right corner of the tube. water Fig heat 16

17 (a) Describe how the molecules of glass conduct heat to the water. [2] (b) Name the main process by which heat moves through the water. [1] (c) On Fig. 16.1, mark using arrows the direction of movement of the water. [1] 6 [10/T2/Q16] In cold countries, windows are designed to reduce heat loss from a room. Fig shows two possible designs. T T Layer of air Single piece of thick glass Two pieces of glass Fig 16.1a Design 1 Fig 16.1b Design 2 (a) For windows of the same thickness, T, which design would be more efficient in reducing heat loss from a room? Explain. [2] 17

18 (b) Explain how replacing the layer of air in Fig 16.1b by a vacuum will affect the performance of the window in reducing heat loss. [2] 7 [10/T3/Q16] (a) Explain why air-conditioning units are usually placed near the ceiling of a room. [2] (b) Explain why it feels much cooler to walk on ceramic tiled floors than wooden floors in an air-conditioned room. [2] 18

19 6.1 Thermal Properties of Matter 1 [10/T1/Q9] Which one of the following is true during the process when a solid melts to a liquid? The particles come closer and the temperature of the substance rises. The particles come closer and the temperature of the substance remains constant. C The particles move further apart and the temperature of the substance rises. D The particles move further apart and the temperature of the substance remains constant. 2 [10/T3/Q10] Which of the following statements about evaporation is true? Evaporation occurs faster when the surrounding environment is more humid. Evaporation occurs only when the boiling point of liquid is reached. C Evaporation takes place throughout the liquid. D Evaporation occurs faster when a larger surface area of the liquid is exposed. 19

20 3 [10/T1/Q15] Fig shows the cooling curve for benzene. CC D E F Fig (a) State the melting point of benzene. [1] (b) Describe the movement of the benzene molecules during the section of the graph. [2] (c) State the change in kinetic energy (if any) of the benzene molecules during section C of the graph. Explain your answer. [2] 20

21 4 [10/T2/Q15] Fig shows the heating curve for an unknown solid M. Temperature / C D E C Time/ s Fig (a) In which section of the graph is the solid melting? [1] (b) Describe the movement of the molecules during the section of the graph. [2] (c) State the change in kinetic energy (if any) of the molecules during section DE of the graph. Explain your answer. [2] 21

22 5 [10/T3/Q15] Fig shows the cooling curve for an unknown liquid Q. Temperature / C C Fig D Time/ s (a) Compare the movement of the molecules during the section of the graph to the movement of the molecules during section CD. [2] (b) Describe the change in the potential energy (if any) of liquid Q during section C of the graph. Explain your answer. [2] 22

CLASSIFIED 2 PRESSURE THERMAL PHYSICS MR. HUSSAM SAMIR

CLASSIFIED 2 PRESSURE THERMAL PHYSICS MR. HUSSAM SAMIR 1. The diagram shows a simple mercury barometer. If atmospheric pressure increases, what happens to level X and to level Y? 2. Four flower vases have