Physics Workshop

Physics Workshop

Paper 6
Question 4

IGCSE
0625/6

Prepared by :
Ahmad Jamalludin Bin Ridzuan

Form 4 Physics coordinator,
MRSM Serting.

Alternative to Practical
Paper 6

Question no 4
7 marks

Why does it matter?

• Compulsory question type since 2016.
• 7 marks out of 40 in paper 6.
• Contribute 3.5% of the total examination.
• Train your speed, 10 minutes and 30 second.

IGCSE Physics design the Experiments Questions @
Paper 6 (**For 2019 candidates**)

1.0 Diagram/Apparatus 4.0 Precautions

2.0 Key variables 5.0 Tables

3.0 Procedure 6.0 Conclusion / Graph

Total marks is 7, predict the mark for each point given
by the question.

1.0 Key variables (1/2 marks)

• Usually the question ask for control variable.
• Control variable: Any other variable that may affect the

outcome. Need to be kept constant during the
experiment.

• State 3 variables which are:
1) Manipulated / Independent Variable (M/I)
2) Responding / Dependent Variable (R/D)
3) Control / Constant Variable (CV)

• State at least 2 control/constant variable.

2.0 Diagram/Apparatus (1/2 mark)

•Depends on the question, if the question doesn’t ask you

may draw a diagram if it helps your explanation

•Always label it.
•Make sure draw measuring apparatus for M/I &

R/D variables

3.0 Procedure (1/2/3 marks)

• Start the experiment with initial value of M/I variable.
• Measure and record the R/D variable by using measuring

apparatus.

• Use formula if necessary.
• Repetition at least 4 value of M/I variable.

4.0 Precautions (1/2 marks)

• State the precaution at least 2.
• Example of answers:

1) Repeat at least 3 times of each value of (M/I variables)
and take average.

2) Make sure the eye of the observer is perpendicular to
the scale reading of (measuring apparatus)

• Never blame tools.
• Don’t state “more carefully”

5.0 Tables (1 mark)

• Two columns of M/I and R/D variables with units.
• You are not required to enter any readings in the table.

M/I (unit) R/D (unit)

6.0 Conclusion/Graph

• Plot a graph of M/I vs R/D

R/D variable + unit

M/I variable + unit

Paper 6
0625/61
October/November 18

Question 4

0625/61 October/November 18

4. A student is investigating the relationship between the
power produced by an electrical heater and the time taken
to heat a beaker of water. The power of the heater is given

by the equation P = VI, where V is the potential difference
(p.d.) across the heater and I is the current in the heater.

Plan an experiment to investigate the relationship between
the power produced by an electrical heater and the time
taken to heat a beaker of water.

The following apparatus is available:

• ammeter
• voltmeter
• 0–12 V variable power supply
• 250 cm3 beaker
• heater
• thermometer
• stopwatch

The student can also use other apparatus and materials that are
usually available in a school laboratory.

You should: Diagram:1 mark

• complete the diagram in Fig. 4.1 to show the circuit that you

would use Procedure: 3 marks
• explain briefly how you would carry out the investigation
• state the key variables that you would control Key variables: 1 marks
• draw a table with column headings, to show how you would

display your readings (you are not required to enter any readings

in the table) Table: 1 marks
• explain how you would use your results to reach a conclusion.
Conclusion: 1 marks

1.0 Diagram: +- Thermometer

A Beaker
Water
Electrical V
heater

2.0 Key variables (CV at least 2):

• Manipulated / Independent Variable:

voltage, V/V // power, P/W

• Responding / Dependent Variable:

time taken, t/s to heat a beaker of water

• Control / Constant:

temperature of water rise,t = 100C,
same volume of water.

3.0 Procedure (carry out the investigation):

1. Setup the apparatus as shown in the diagram.
2. Adjust the voltage of power supply to 2V and start the stopwatch.
3. Record the reading of voltmeter, ammeter and initial temperature.

4. Calculate the power of electrical heater by using the formula P = IV

5. Wait until the temperature of water rise to 10˚C and record the time
taken.
6. Repeat steps 1-5 with 4V, 6V, 8V and 10 V voltage of power supply.

4.0 Precaution (at least 2):

• For each voltage of power supply, repeat 3 times and take

average.

• Make sure the eye of the observer is perpendicular to

scale reading of voltmeter/ammeter.

5.0 Table (M/I & R/D + unit without data):

current, I/A voltage, V/V power, P/W time taken,
t/s

6.0 Conclusion (Plot a graph of M/I V vs R/D V):

time taken, t/s

power, P/W

Lets check our answer !!!

Mark scheme 0625/61 Oktober/November 2018

Point given in Answer Marks
the question 1
1
Diagram MP1 Workable, correct circuit diagram with power source and correct 1
symbols for ammeter and voltmeter. 1
1
Procedure MP2 Measuring V and I
1
MP3 Repeating with at least two other values of V or power, and / or I 1

MP4 Measuring time to raise water temperature by a specific amount or to
a specific value

Key variables MP5 Any ONE from:
Same starting temperature
Same temperature difference
Same volume / mass / amount of water

Table MP6 Table with clear columns for time, V and I, with appropriate units
and P(or VI)

Conclusion MP7 Conclusion: Plot a graph of power against time.

Paper 6
0625/62
October/November 18

Question 4

0625/62 October/November 18

4. A student is investigating whether the type of container affects the time
taken for water to be heated from room temperature to boiling point.

The following apparatus is available:

250 cm3 copper can
250 cm3 aluminium can
250 cm3 glass beaker
Bunsen burner
measuring cylinder
thermometer
tripod and gauze
stopwatch

Other apparatus normally available in the school laboratory is also available.

Plan an experiment to investigate whether the type of container affects the
time taken for water to be heated from room temperature to boiling point.

You should: Procedure: 3 marks

• explain briefly how you would carry out the investigation

• state the key variables that you would control Key variables: 2 marks

• draw a table, or tables, with column headings to show how you would display

your readings (you are not required to enter any readings in the table)

• explain briefly how you would use your readings to reach a conclusion.

Conclusion: 1 mark Table: 1 mark

1.0 Diagram:

A diagram is not required but you may draw a diagram if it

helps your explanation Thermometer

Container

Water

Bunsen burner

Tripod stand

2.0 Key variables:

• Manipulated / Independent Variable:

type of container

• Responding / Dependent Variable:

time taken, t/s for water to be heated

• Constant:

same distance from the flame to the bottom of the container,
same initial temperature of water.

3.0 Procedure (carry out the investigation):

1. Setup the apparatus as shown in the diagram.
2. Start the experiment by using 250 cm3 copper can fills with 150 cm3
of water.
3. Measure the initial temperature of water by using thermometer.
4. Heat the water and start the stopwatch until it become boil.
5. Record the time taken for the water to boil.
6. Repeat step 1 -5 with 250 cm3 aluminium can, 250 cm3 glass
beaker, 250 cm3 iron can and 250 cm3 copper can.

4.0 Precaution (at least 2):

• For each type of container, repeat 3 times and take

average.

• Make sure the eye of the observer is perpendicular to

scale reading of stopwatch/thermometer.

5.0 Table (M/I & R/D + unit without data):

type of time taken for
container the water to
boil, t/s

6.0 Conclusion (Plot a graph of M/I V vs R/D V):

time taken, t/s

type of container

Lets check our answer !!!

Mark scheme 0625/62 Oktober/November 2018

Point given in Answer Marks
the question
1
Procedure MP1 measure room / starting temperature 1
1
MP2 measure time to raise water temperature to boiling point 1

MP3 repeat with the other two containers 1

Key variables MP4 any two from: 1
same starting temperature / same room temperature 1
same volume / mass / amount of water

MP5 keep Bunsen burner flame constant / keep the distance from the
flame to the bottom of the beaker constant

Table MP6 table to show container and heating time

Conclusion MP7 comparison of heating times and suitable comment made

Paper 6
0625/63
October/November 18

Question 4

0625/63 October/November 18

4. A student is investigating the conduction of thermal energy by
metals.
Plan an experiment to compare the rates at which different metals
conduct thermal energy.
The apparatus available includes:
strips of different metals, shaped as shown in Fig. 4.1
a test-tube in a clamp stand
a beaker
a supply of cold water
a supply of hot water.

The shorter section of each strip of metal can fit inside a test-tube.

Write a plan for the experiment.
Apparatus: 1 marks
You should:

• list any additional apparatus needed Diagram: 1 marks

• draw a labelled diagram of how the apparatus will be arranged

• explain briefly how you will carry out the experiment
Procedure: 2 marks
• explain how the metals will be compared

• state the precautions which should be taken to obtain reliable

results. Comparison/table: 1 mark

Precaution: 2 marks

1) Apparatus:

• Thermometer, stopwatch, stirrer

2.0 Diagram: thermometer

strip of test tube
different cold water
metals

beaker
hot water

3.0 Key variables:

• Manipulated / Independent Variable:

type of strip metal

• Responding / Dependent Variable:

temperature rise

• Constant:

same duration of experimet,
same initial temperature of cold water.

3.0 Procedure (carry out the investigation):

1. Setup the apparatus as shown in the diagram.
2. Start the experiment by using copper strip.
3. Measure the initial temperature of cold water by using
thermometer.
4. Start the stopwatch for 5 minutes.
5. After 5 minutes record the final temperature of cold water in the
test tube by using thermometer.
6. Repeat step 1 -5 with aluminium strip, iron, brass and zinc strip.

4.0 Precaution (at least 2):

• For each type of metal strip, repeat 3 times and take

average.

• Make sure the eye of the observer is perpendicular to

scale reading of stopwatch/thermometer.

• Use insulation for both beaker and test tube to avoid heat

lost to the surrounding.

5.0 Comparison (can use table):

type of metal strip temperature rise = final
temperature of cold water –
initial temperature of cold
water

6.0 Conclusion (Plot a graph of M/I V vs R/D V):

temperature rise, T/0C

type of metal rise

Lets check our answer !!!

Mark scheme 0625/63 Oktober/November 2018

Point given in Answer Marks
the questions 1
1
Apparatus MP1 thermometer AND stopwatch / (stop)clock / timer 1

Diagram MP2 workable arrangement 1
1
Procedure MP3 hot water in beaker and cold water in test-tube AND measure (start 1
and) end temperatures in test-tube
Comparison/ AND over measured time
Table
Precaution MP4 repeat for different metals

MP5 calculation of (rate of) temperature rise / heating curves for different
metals

MP6 and MP7 Precautions
Any two from:
same start temperatures (of hot / cold water);
same duration of experiment;

Paper 6
0625/62
February/March 18

Question 4

0625/62 February/March 18

4 A student is investigating the factors that affect the size of
the crater (hole) a ball makes when it is dropped into sand.
Plan an experiment which would enable you to investigate
one factor which might affect the size
of the crater.
The apparatus available includes
metal balls of different sizes
a tray of sand

Write a plan for the experiment. M/I :1 mark
In your plan you should: CV: 1 mark

• state which factor is being investigated,
• state the key variables that you would control, Apparatus: 1 mark

• list any additional apparatus needed, Procedure: 2 marks

• explain briefly how you would carry out the experiment including

what would be measured and how this would be done,

• state the precautions which should be taken to obtain reliable
Precaution: 1 mark
results, Conclusion: 1 mark

• suggest a suitable graph which could be drawn from the results.

You may draw a diagram if it helps to explain your plan.

1.0 Diagram/Apparatus: Ball
Meter rule, measuring tape

h

Sand

2.0 Key variables (CV at least 2):

• Manipulated / Independent Variable:

diameter of metal ball (factors being investigate)

• Responding / Dependent Variable:

diameter of crater

• Control / Constant:

height of metal ball release,
mass of metal ball.