Hong Kong Examinations and Assessment Authority & Curriculum Development Institute, EDB Teachers’ Meeting for HKDSE Physics SBA

Date : 21st November, 2015 (Saturday) Time : 9:30 a.m. to 11:30 a.m. Venue : Lung Kong WFSL Lau Wong Fat Secondary School Programme : Time Events

9:30 a.m. – 9:40 a.m. Registration 9:40 a.m. – 10:00 a.m. Introduction

- 2015 SBA moderation - 2016 + 2017 SBA requirements

Mr SZETO Yuk Tong (HKEAA) 10:00 a.m. – 10:35 a.m. Teacher’s sharing

- Using mobile phone apps to study the motion along an inclined plane Mr LAW Man Wai (PLK Lo Kit Sing (1983) College) 10:35 a.m. – 11:10 a.m. Supervisors’ remarks

- 2015 SBA Supervisors’ Report - Points to note about report marking and assessment for learning

Dr LAU Yiu Hon (EDB) 11:10 a.m. – 11:30 a.m. Q&A List of Documents 1. HKDSE SBA arrangement, Resource Materials and Useful Websites 2. PowerPoint presentations 3. Experiment – Acceleration along an inclined plane (using mobile phone apps) (Mr LAW Man Wai) 4. List of suggested experimental work for SBA

Materials available on HKEAA web page (http://www.hkeaa.edu.hk/tc/sba/sba_hkdse_elective/dse_subject.html?20) 1. Handbook for School Leaders on SBA 2. SBA Teachers’ Handbook 3. SBA Sample Tasks

***************************************************************************************** 物理科教學資源 1. 課程資源  

http://www.edb.gov.hk/en/curriculum-development/kla/science-edu/ref-and-resources/physics-curriculum-resources.html http://www.edb.gov.hk/tc/curriculum-development/kla/science-edu/ref-and-resources/physics-curriculum-resources.html

高中物理科課程知識增益系列：醫學物理和臨床應用     2015香港中學文憑物理科及組合科學科(物理部分)考試簡報會  香港中學文憑考試 物理/組合科學(物理) ‐ 數據、公式和關係式 (報考2016 香港中學文憑考試學生適用)   2014香港中學文憑物理科及組合科學科(物理部分)考試簡報會   新高中物理科課程學與教策略：天文學和航天科學（一）  2013香港中學文憑物理科及組合科學科(物理部分)考試簡報會   教學要點說明 ‐ 新高中組合科學課程(物理部分) (報考2016 香港中學文憑考試學生適用)     教學要點說明 ‐ 新高中物理課程 (報考2016 香港中學文憑考試學生適用)    香港中學文憑考試校本評核建議物理實驗名單     2012香港中學文憑物理科及組合科學科(物理部分)考試簡報會 English only     香港中學文憑考試 物理/組合科學(物理) ‐ 數據、公式和關係式     香港中學文憑考試 物理科 ‐ 校本評核樣本作業 (探究研習)     醫學物理學的互動學與教範例     香港中學文憑考試 物理及組合科學 (物理) 校本評核樣本作業 (實驗有關作業)    高解像度運動錄像分析軟件   

2. 物理科教師專業發展及資源共享平台 http://edblog.hkedcity.net/cdiphysics

3. 天文學和航天科學 http://www.lcsd.gov.hk/CE/Museum/Space/zh_TW/web/spm/starshine.html

4. 原子世界 http://www.hk-phy.org/atomic_world/

5. 能量和能源的使用 http://www.hk-phy.org/energy/index_e.html

6. 醫學物理學 http://www.hkedcity.net/article/project/medicalphysics/ Interactive Learning and Teaching Package for Medical Physics

http://cd1.edb.hkedcity.net/cd/science/physics/NSS/MedicalPhysics.zip

7. 高解像度運動錄像分析 (HDMVA) http://physics.hk/hdmva/ Tracker ‐ http://www.cabrillo.edu/~dbrown/tracker/  

8. 教育電視資源 http://resources.hkedcity.net/etv/   探究研習(物理篇) 

「探究研習」是新高中物理課程其中一個的重要學與教活動。課程提供一定的課時，在教師指導下、進

行相對獨立有計劃的學習經歷。學生在教師指導和實驗室技術員支援下訂定探究題目，自主設計實驗，

主動進行探究，收集及分析數據作出結論。「探究研習」是通過調整教學方法，提供學生主動積極自主

學習的機會，培養學生獨立思考與解決問題的能力。「探究研習」是提升學生自學能力和教師教學方法

的一個平台。教師會因應學校（校本）和學生能力差異的情況，設計探究的流程、模式、課題、難度等

以推行探究活動。這教育電視節目以記錄片形式，讓教師們及學者分享在學校推行「探究研習」的理念

和策略，也讓學生們說出進行探究時所經歷的學習過程和所獲得到的滿足感。實驗室技術員亦分享了在

「探究研習」過程中為教師及學生所提供的支援。本節目極為適合教師、學生及實驗室技術員觀看欣

賞，並作為新高中物理科「探究研習」的輔助學習教材。  

http://resources.hkedcity.net/resource_detail.php?rid=741932149    （中文播出版）  http://resources.hkedcity.net/resource_detail.php?rid=1858942238          （英文播出版）  http://resources.hkedcity.net/resource_detail.php?rid=1139923892   （學生‐ 中文版）  http://resources.hkedcity.net/resource_detail.php?rid=780251301 （學生‐ 英文版） 

  通訊新領域 

香港城市大學電子工程學系及毫米波國家重點實驗室陸貴文講座教授、陳志豪講座教授和薛泉教授經過

十年來的努力不懈，研發無線通訊天線技術，配合國家科技發展和應用，獲得2011年度「國家科學技術獎」中，國家科學技術發明獎二等獎，為香港科研人員爭光，亦為國家作出重大貢獻。 

http://resources.hkedcity.net/resource_detail.php?rid=19010548    （中文版）      http://resources.hkedcity.net/resource_detail.php?rid=116886921   （英文版） 

  透視妙法 (Seeing Through the Human Body Part I) 

節目透過模擬病例介紹三種現代醫學使用的先進診斷技術，包括X射綫電腦斷層造影技術、磁共振造影技術和內窺鏡檢視技術。節目對每一種醫療檢視方法都作一個概括的介紹，同時利用三維動畫影像扼要解

釋背後所應用的物理學原理，讓同學們除了認識各種掃描儀器的運作情況外，更加加深對課堂上學習的

物理原理的理解，引發學習的興趣和動機。本節目極為適合教師及學生作為新高中物理科「醫學物理

學」的學習教材。

http://resources.hkedcity.net/resource_detail.php?rid=1757173944   （中文版）  http://resources.hkedcity.net/resource_detail.php?rid=567576077     （英文版） 

  透視妙法 (Sequel of Seeing Through the Human Body Part II) 

節目透過模擬病例介紹現代醫學使用的先進診斷技術，包括超聲波掃描技術和核子醫學檢視技術，極為

適合教師及學生作為新高中物理科「醫學物理學」的學習教材。

http://resources.hkedcity.net/resource_detail.php?rid=617519262           （中文版）  http://resources.hkedcity.net/resource_detail.php?rid=111500338 （英文版） 

  

 9. 香港建築: 中學教材之建築學導引 

http://minisite.proj.hkedcity.net/hkiakit/cht/Science/index.html 這教材是由香港建築師學會統籌，香港大學建築學院社會項目工作坊研究支援，香港特別行政區教育局

提供顧問意見，商務及經濟發展局轄下創意香港贊助。教材內容適合「能量和能源的使用」單元中有關

熱傳送系數、總熱傳送值和建築節能措施的學與教用途。內容包括：  建築力學－歷史回顧  建築的噪音控制與  綜合熱傳值和熱傳系數的計算和應用  模型製作工作坊－塔  視像 : 建築節能措施 /演講廳的聲樂設計 /城市熱島效應   實地考察：中環－摩天大廈的結構 /香港濕地公園－人類影響、污染控制、可持續發展和能源效益 

10. 香港中學文憑考試  (校本評核/ 評核大綱) 

新聞稿：香港中學文憑考試校本評核精簡安排  (14/2/2012) http://www.hkeaa.edu.hk/DocLibrary/Media/PR/PR_20120214_chi.pdf http://www.hkeaa.edu.hk/DocLibrary/Media/PR/PR_20120214_eng.pdf

  香港中學文憑科目評核大綱 (至 2018) 

http://www.hkeaa.edu.hk/tc/hkdse/assessment/assessment_framework/

姓名 : ___________________ 班號 : ___________ 組別 : __________

沿斜面的加速度

目的 :

測定傾角怎樣影響沿斜面運動的加速度

儀器 :

2 智能手機

1 斜面

1 小車

1 電腦

1 膠泥 / 膠紙

1 軟布

數本舊書

理論 :

當小車沿斜面下行時，在摩擦和自身重量沿斜面的分量作用下，小車會加速下行。

由於物體的重量沿斜面的分量 (W sin θ) 取決於傾角 θ，小車的加速度隨 θ 而增加。在分

析斜面時，你可假設當角度很小時 (θ < 10o) 摩擦跟 θ 無關。

步驟 :

1. 將應用程式 Accelerometer 和 Smart Compass 裝設在你的手機上。實驗前先參閱用戶手冊，

你亦可在家裏試試這些應用程式。

2. 在實驗室旁邊的實驗檯裝置一斜面。

摩擦 摩擦

重量 W mg

重量可分解成兩個分量。這兩個分量合成則可取代重量。

W

W sin θ

W cos θ

3. 以膠紙 / 膠泥把手機黏貼於小車上面。 y-方向 (參照用戶手冊 ) 應為手機指向前進的

方向。此實驗不要使用昂貴的手機，因手機有可能會被刮花。

4. 以舊書將跑道的一端墊起。利用全部舊書將跑道墊至最高。為免速度過高，傾斜度

須限制為小於 10。在跑道末端放一塊軟布以吸收小車的撞擊。

5. 用另一手機以應用程式 Angle Meter 量度斜面的傾角 θ。

6. 將小車連同第一部手機放於斜面頂端。驅動應用程式 Accelerometer 並開啓存取。

7. 當智能手機正收集數據時把小車釋放。在小車到達跑道末端時即停止存取。

8. 現移走一至兩本書以減低傾斜度。設定最少另外五個角度並重複步驟 (5) 至 (7)。注意

小車或只會慢慢加速，因角度跟摩擦補償跑道的漸趨接近。

y-方向

9. 從智能手機複製數據檔到電腦。根據在用戶手冊中的步驟以 Excel 打開文字檔。在

表中尋找對應在釋放小車前後沿 y-方向的加速度的部分。由於重力存在的關係，會

有一虛假讀數使初始讀數不是零。求取釋放小車前後沿 y-方向的加速度平均值。

X Y Z t

釋放小車前

釋放小車後

結果與數據分析 :

根據 Accelerometer 所收集到的數據以及 Angle Meter 所讀取的角度完成下表。標繪

𝑎 − 𝑎0 對 sin 𝜃 的線圖。

傾角 θ sin θ 小車釋放前的加速度

a0/m s2

小車釋放後的加速度

的平均讀數 a/m s2

平均加速度

a – a0 /m s2

平均加速度 / m s2

sin θ

完整報告

提交一報告作為工作紙的延伸。已經包括在工作紙的項目可以不必重複。你的報告應

包括下列各項。

(1) 標題與目的

這部分可從工作紙抄錄。

(2) 儀器和步驟

科學實驗的傳統完整報告須有這部分。由於工作紙已作提供，你的報告可省略

這部分。

(3) 理論

推導有關小車加速度、摩擦和斜面傾斜度的理論關係式。清楚指出報告中各個

未知數的意思。

(4) 結果

在這部分附上 P.4 (原始數據列表以及加速度對 sin θ 的線圖 ) 以顯示你的實驗

結果。

(5) 數據分析

從理論部分你所得的理論關係式，推斷你所標繪線圖的預期形狀。比較實際所

繪線圖和預期的線圖。

(6) 結論

從你的數據分析所得結果作出結論。

(7) 討論

討論有關實驗的誤差、準確度以及其他相關事項。

Name: ___________________ Class No.: ___________ Group: __________

Acceleration along an inclined plane

Objective:

To determine the effect of inclination angle on the acceleration down an inclined plane

Apparatus:

2 smart phones

1 inclined plane

1 trolley

1 computer

1 blu-tack/adhesive tape

1 soft cloth

Old text books

Theory:

When a trolley moves down along an inclined plane, it accelerates under the action of friction and the

component of its weight along the plane.

As the component of its weight (W sin θ) along the inclined plane depends on the angle of inclination , the

trolley’s acceleration increases as increases. In analysis of inclined plane, you may assume that the

friction is independent on θ for small angles (θ < 10°).

Procedures:

1. Install the apps Accelerometer and Smart Compass in your mobile phones. Study the user manual

before you come to the laboratory. You may try-out these apps at home.

2. Set up an inclined plane along the side bench of the laboratory.

Friction Friction

Weight W W

W sin θ

W cos θ

3. Attach a mobile phone with blu-tack and/or adhesive tape on the top of the trolley. The y-direction (refer

to the user manual) should be pointing to the forward direction of the phone. Do not use an expensive

phone for this purpose as it may be risky to get the phone scratched.

4. Raise one end of the runway with old text books. Set to the largest height with all available books. To

avoid over-speed, the inclination should be limited to less than 10. Place a piece of soft cloth at the

bottom end to absorb the impact of the trolley.

5. Measure the inclination of the inclined plane with the apps Smart Compass in another phone.

6. Put the trolley with the first smart phone at the upper end of the inclined plane. Run the apps

Accelerometer and start saving.

7. Release the trolley while the smart phone is capturing data. As the trolley reaches the bottom of the

inclined plane, stop saving at once.

8. Now reduce the inclination by removing one or two books. Repeat steps (5) to (7) for at least five more

angles. Notice that the trolley may accelerate very slowly as the angle becomes closer to the one for

friction-compensated runway.

y-direction

9. Copy the data files from the smart phone to the computer. Open the text file with Excel according to the

steps in the user manual. Locate the part in the table corresponding to the acceleration in the y-direction

before and after the trolley is released. The initial reading is not zero since there is a false reading due to

gravity. Get the mean acceleration before and after the trolley is released along the y-direction.

X Y Z t

Before release

After release

Results and Data Analysis:

From the data captured by the Accelerometer and the angle read from the Angle Meter, complete the

following table. Plot a graph of 𝑎 − 𝑎0 versus sin 𝜃.

Inclination θ sin θ Reading of acceleration

before the trolley is

released a0/m s2

Average reading of

acceleration after the

trolley is released a/m s2

Average acceleration

a – a0 /m s2

average acceleration / m s2

sin θ

Full Report

Submit a report as the continuation of the worksheet. It is not required to repeat the parts found in the

worksheet. Please include the following parts to your report.

(1) Title and Objective

This part can be copied from above.

(2) Apparatus and Procedures

This part is required in a classical full report of science experiment. As it is already given above, you

may skip this part in your own report.

(3) Theory

Derive a theoretical relationship between the acceleration of the trolley, friction and inclination of the

plane. Clearly state the meaning of all unknowns involved in your work.

(4) Result

Attach P.4 (raw data and graph of acceleration vs sin θ) in this part to show your experimental result.

(5) Data analysis

From the theoretical relationship you found in (a), determine the expected shape of the graph you plotted

above. Compare the actual graph and the expected graph.

(6) Conclusion

Draw a conclusion from your result in your data analysis.

(7) Discussion

Comment on the error, accuracy and any matters related to the experiment.

[只作最少指導的版本]

沿斜面的加速度

學生工作紙 (手機應用程式 )

簡介 :

現今所有智能手機都具備內置的傳感器（加速計）來測量加速度，利用合適

的 iOS/ Android 應用程式手機便可以輕易地量度加速度。你的任務是設計並

進行一個實驗，透過這些應用程式找出一物體的加速度。

作業 :

伽利略其中一個最著名的實驗是測量加速度。他使一黃銅球從木製的斜道滾

下，並以自己的脈搏作為計時器來測定其加速度！你的任務是用類似的設備

進行一個實驗，以確定傾角怎樣影響物體沿斜面運動的加速度。

物料 :

智能手機 1,2 斜面

小車 桌面 / 手提電腦

軟布 膠泥 / 膠紙

數本書籍

1. 在標題步驟之下，依次序列出你解決這問題的各個步驟。可輔以繪圖來

幫助說明你的實驗計劃，並包括任何須遵循的安全措施。計劃的細緻度

須足以讓其他人可按著照辦。

2. 構建一個數據列表或顯示其他用以記錄你的觀察和結果的方法。

3. 按照你所列出的步驟進行實驗。

4. 在標題結果 /觀察之下，記錄實驗中的各項觀察。使用敍述和段落描述，

並在所構建的數據列表中記錄所有的測量。

5. 在標題計算之下，顯示所使用的公式和計算。

6. 標繪線圖以顯示在此實驗所測量的變量之間的關係。

7. 在標題結論之下，就你所得結果作出解釋。基於在實驗所收集數據繪成

的線圖以作分析，討論物體沿斜坡下行的加速度。須解釋你如何利用所

得數據以得出此結論。

8. 於 45 分鐘後呈交你的答卷。

1 Accelerometer Monitor for iOS/Android phone in Apps/Google Play Store

2 Angle meter for iOS/Android phone in Apps/Google Play Store

[version with minimal guidance]

Acceleration along an inclined plane

Student Task Sheet (Mobile Apps)

Introduction:

Nowadays all smart phones contain a build-in sensor (accelerometer) to measure acceleration.

It can measure acceleration easily with suitable iOS/Android apps. Your task is to design and

conduct an experiment to find out the acceleration of an object using this app.

Task:

One of Galileo's most significant experiments was his measurement of acceleration. He rolled

a brass ball down a wooden ramp and determined its acceleration using his pulse as a timer !

Using similar equipment, your task is to conduct an experiment to determine the acceleration

of an object down an inclined plane.

Materials:

A smart phone1,2 Inclined plane

Trolley PC / Laptop computer

Soft cloth Blu-tack/adhesive tape

A few textbooks

1. Under the heading PROCEDURE, list in order the steps of the procedure you will use to

solve the problem. You may include a diagram to help illustrate your plans for the

experiment. Include any safety procedures to be followed. Be detailed enough so that

someone else could follow your procedure.

2. Construct a DATA TABLE or indicate any other method that you could use to record

your observations and results.

3. Perform the experiment by following the steps outlined in your procedure.

4. Under the heading RESULTS/OBSERVATIONS, record the observations collected in

the experiment. Use statements and descriptive paragraphs, and record all measurements in

the data table you constructed.

5. Under the heading CALCULATIONS, show all the equations and calculations used.

6. Construct a GRAPH that shows the relationship between the variables measured in this

experiment.

7. Under the heading CONCLUSION, give an interpretation of your results. Based on your

graphical analysis of the data you collected in this experiment, discuss the acceleration of

the object as it moves down the ramp. Be certain to explain how you used your data to

arrive at this conclusion.

8. At the end of 45 minutes, your answer will be collected.

1 Accelerometer Monitor for iOS/Android phone in Apps/Google Play Store

2 Angle meter for iOS/Android phone in Apps/Google Play Store

[version with minimal guidance]

Extension:

(1) State the control variables(s), dependent variable(s) and independent variable(s) in this

experiment. Which one should be written along the horizontal or X-axis ?

(2) Identify and discuss the sources of uncertainty (errors) that may encounter in the

experiment.

(3) From the graph plotted above, write a statement that summarizes the trends in data. Write

a statement of relationship between the variables: acceleration of the object and the angle

of inclination of the inclined plane ?

(4) Does the graph pass through the origin ? If not, explain why ?

(5) Most experiment should be repeated by testing each level of the independent variable

several times. Why repeated trials are required ?

(6) Do you expect a small ball (instead of a trolley) to have a smaller, larger, or the same

acceleration as a much larger ball along the inclined plane ? What effects need to be

taken into account to answer this question ?

Motion, Measurement and Statistics:

(7) Show that the final speed of the ball is given by 𝑣 = √2𝑔ℎ where h is the initial height,

which is the vertical distance between the flat rolling surface and the bottom of the ball at

its point of release.

(8) Can you think of two different ways to measure the velocity ?

(9) How do you decide what length or time interval you use to get the best possible

precision ? In other words, why might your precision be negatively affected if your

length/time is either (a) too short or (b) too long ?

(Revised as of 28 October 2013) The table below illustrates the considerable scope which teachers have in choosing practical work for SBA. It is hoped that this can help teachers plan their teaching and assessment arrangement. However, teachers should feel free to devise their own innovative or/and project-based practical activities for assessment in particular areas of the syllabus as long as they are of appropriate standard and can meet the criteria for awarding marks. There is no list of prescribed or recommended practical work which must be used for assessment purposes since teaching interests and resources vary from school to school.

Some suggested experimental work Syllabus Topic of HKDSE

Suitable for

assessment

Measurement of the specific heat capacity of a liquid using a low voltage immersion heater and a foam cup.

(I)

Measurement of the specific latent heat of fusion of ice using a low voltage immersion heater.

(I)

Measurement of the specific latent heat of vaporization of water using a mains heater.

(I)

Cooling curve of octadecan-1-ol. (I) Investigation of the relationship between pressure, volume and temperature of a gas.

(I)

Study the effects of the normal force, materials involved and surface area on the force of friction using a block.

(II)

Investigation of the relationship between (a) acceleration and force when the mass is constant; and (b) acceleration and mass under a constant force.

(II)

Measuring g by simple pendulum / spring-mass system / HDMVA method. (II)

Finding the C.G. of lamina with irregular shapes (II)

Finding an unknown mass by balancing a ruler on a knife-edge using standard weights

(II)

Conservation of linear momentum in elastic/inelastic collision of trolleys (further investigation on loss of kinetic energy in inelastic collisions).

(II)

Experimental test of r

mvF2

by whirling a rubber bung. (II)

Ripple Tank Experiments. (III)

Measuring critical angle and refractive index of a semi-circular plastic block. (III)

Stationary wave pattern at different frequencies using a signal generator. (III)

Estimation of the wavelength of light using (a) double slit; and (b) plane diffraction grating.

(III)

Measurement of focal length of convex lenses by different methods: (a) image formation of a distant object; (b) plane mirror method; and (c) lens formula.

(III)

Finding the wavelength / wave speed of sound wave by interference of sound waves using two loudspeakers and CRO.

(III)

(Revised as of 28 October 2013)

Some suggested experimental work Syllabus Topic of HKDSE

Suitable for

assessment

Drop in terminal p.d. of power supplies delivering current and using different voltmeters to measure the terminal p.d. of a power supply with high internal resistance.

(IV)

Using a current balance to measure the magnetic fields (a) between two magnadur magnets; (b) close to the end of a current-carrying coil; and (c) inside a flat solenoid carrying current.

(IV)

Using a Hall probe or a search coil to investigate the magnetic fields (a) around a long straight wire; (b) at the centre of a coil; (c) inside and around a slinky solenoid; and (d) inside a solenoid, carrying current.

(IV)

Investigation of the factors affecting the induced e.m.f. in a coil. (IV)

Study of transformer action : (a) the effect of the flux linkage; (b) the relationship between voltage ratio and turn ratio; (c) the dependence of the current in the primary coil on the loading; and (d) comparison between input and output power.

(IV)

(a) Measurement of the resistance of a conductor with a voltmeter and an ammeter (Ohm’s law).

(b) Change of the resistance of filament of a lamp with temperature. (c) Change of the resistance of a conductor with its length and cross-

sectional area.

(IV)

Measurement of the internal resistance of a battery. (IV)

Measurement of the power output of a battery with time (IV)

Study of the factors affecting the strength of an electromagnet. (IV)

Use of the oscilloscope as a d.c. and an a.c. voltmeter, for waveform display and time base for frequency measurement.

-

Study the relationship between light intensity of a light bulb with distance by a light meter.

(VIII)