tips : paper 3-part-2-spm
DESCRIPTION
Credits to Cikgu Zulaili n Cikgu Ahmad HussainiTRANSCRIPT
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Paper 3
Zulaili Yaacob&
Mohamad Hussaini
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SECTION A : Question 1
1(a)(i) Manipulated variable : ____________________
1(a)(ii) Responding variable : ____________________
1(a)(iii) Constant variable : ____________________
1
2
0
l
1
Figure 11.2 : Temperature, = 30 C
length, l = ………… cm
m.v
r.v
Temperature,
Length, l
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SECTION A : Question 1
1(a)(i) Manipulated variable : ____________________
1(a)(ii) Responding variable : ____________________
1(a)(iii) Constant variable : ____________________ (depends on the experiment)
MISTAK
ES!!!
Which of the following is possibly a constant variable?
A) Mass B) Thermometer C) Air
A) Water B) Stopwatch C) Time
A) Length B) Air column C) Ruler
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SECTION A : Question 1
1(b) Based on Figures 11.2, 11.3, 11.4, 11.5, and 11.6, determine l when is equal to 30 C, 35 C, 40 C, 45 C and 50 C.
Tabulate your results for l and V for each value of in the space below.
/ C l / cm V / cm3
30
35
40
45
50
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SECTION A : Question 1 Spot the errors!
t1 t2 tmean T T2 l
17 17.6 17.3 0.87 0.76 20
22.4 22 22.2 1.11 1.23 30
25 24.6 24.8 1.24 1.54 40
28 28.8 28.4 1.42 2.02 50
30.8 31 30.9 1.55 2.4 60
No unit!
Not consistence!
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SECTION A : Question 1 Spot the errors!
Unit at the wrong place!
l t1 t2 tmean T T2
20.0 cm 17.0 s 17.6 s 17.3 s 0.87 s 0.76 s2
30.0 cm 22.4 s 22.0 s 22.2 s 1.11 s 1.23 s2
40.0 cm 25.0 s 24.6 s 24.8 s 1.24 s 1.54 s2
50.0 cm 28.0 s 28.8 s 28.4 s 1.42 s 2.02 s2
60.0 cm 30.8 s 31.0 s 30.9 s 1.55 s 2.40 s2
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SECTION A : Question 1 Spot the errors!
Wrong unit!
Not consistence!
l/ cm t1 / s t2 / s tmean / s T / s T2 / s
20.0 17.0 17.6 17.3 0.865 0.748
30.0 22.4 22.0 22.2 1.11 1.232
40.0 25.0 24.6 24.8 1.24 1.537
50.0 28.0 28.8 28.4 1.42 2.016
60.0 30.8 31.0 30.9 1.545 2.387
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SECTION A : Question 1 Spot the errors!
No error!
l/ cm t1 / s t2 / s tmean / s T / s T2 / s2
20.0 17.0 17.6 17.3 0.87 0.76
30.0 22.4 22.0 22.2 1.11 1.23
40.0 25.0 24.6 24.8 1.24 1.54
50.0 28.0 28.8 28.4 1.42 2.02
60.0 30.8 31.0 30.9 1.55 2.40
GOOD ANSWER!
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SECTION A : Question 1
BAD GRAPH!
GOOD GRAPH!
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SECTION A : Question 1
What is a GOOD graph?
1) Starting at origin (0,0)
2) Write quantities and units on x-axis and y-axis
3) Has uniform scale
4) All points are transferred correctly
5) Draw one straight line and intersect any of the axes
6) Distribute other points equally
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SECTION A : Question 1
Accepted graph
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SECTION A : Question 1
Rejected graph
more than 1 cm
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SECTION A : Question 1
Rejected graph
more than 0.5 cm
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SECTION A : Question 1
Conclusion
a
b
A) a is inversely proportional to b
B) a is directly proportional to b
C) a is linearly increasing with b
a
b
A) a is inversely proportional to b
B) a is directly proportional to b
C) a is linearly increasing with b
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SECTION A : Question 1
Conclusion
A) a is inversely proportional to b
B) a is directly proportional to b
C) a is linearly increasing with b
A) a is inversely proportional to b
B) a is directly proportional to 1/b
C) a is linearly increasing with 1/b
a
b
a
1/b
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SECTION A : Question 22(a)(i) Relationship
A) a is inversely proportional to b
B) a is directly proportional to b
C) a is linearly increasing with b
A) a is inversely proportional to b
B) a is directly proportional to 1/b
C) a is linearly increasing with 1/b
a
ba
1/b
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SECTION A : Question 2
2(a)(i) Relationship
a
b
A) a is inversely proportional to b
B) a is directly proportional to b
C) a is linearly increasing with b
a
b
A) a is inversely proportional to b
B) a is directly proportional to b
C) a is linearly increasing with b
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SECTION A : Question 2
2(a)(ii) Determine Corresponding Value
h / cm
P / Nm-2
1.0 2.0 3.0
1.0
2.0
3.0
4.0 P = 4.0 Nm-2
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SECTION A : Question 2
2(a)(ii) Determine Corresponding Value
1/m / g-1
/ C
0.1 0.2 0.3
1.0
2.0
3.0
4.0 1/m = 0.3 g-1
m = 3.3 g
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SECTION A : Question 2
2(b)(i) Determine Gradient
1/m / g-1
/ C
0.1 0.2 0.3
1.0
2.0
3.0
4.0
Gradient, m = 4.0 C 0.3 g-1
m = 13.33 C g
y
x
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SECTION A : Question 2
2(b)(ii) Calculation problem (involving the gradient)
Reminder!
1)Use the value of gradient obtained in previous question
2) Check for the conversion of units
3) Substitute figures at the correct places
4) Write the final answer in decimal number (Do not give the answer in fraction!!!)
5) Do not forget the UNIT
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SECTION A : Question 22(c) Calculation problem
Reminder!1) Check for the conversion of
units2) Substitute figures at the correct places
3) Write the final answer in decimal number (Do not give the answer in fraction!!!)
4) Do not forget the UNIT
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SECTION A : Question 2
2(d) Precaution
Reminder!
1) It is NOT SAFETY PRECAUTION!!!
Take few readings and find the average to reduce random error
Position of eyes is perpendicular to the scale to avoid parallax error
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Paper 3
Section B
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Variables : Air pressure , Temperature.Manipulated :Responding : Constant :
temperatureAir pressureVolume of air
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inference
MV affects RV
affects temperatureair pressure
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hypothesis
• When increases, , increases
Temperature
Air pressure
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aim
To investigate the relationship between
and
temperature
pressure
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Method of controlling manipulated variable
• Manipulate variable : temperaturecontrol : the first temperature
Heat up the water to 20 0C
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Method of measuring responding variable
• Responding variable : pressure
• Measure pressure using : Bourdon gauge
Using Bourdon gauge , measure the pressure and record the data
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Analyse data
Temperature / K Pressure / Nm-2
20
3040
50
60
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Graph
Temperature / K
Pressure / Nm-
2
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variables
• Manipulated :
• Responding :
• Constant :
length
resistance
diameter
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inference
• _ affects length
resistance
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hypothesis
• When increases, , increases
length
resistance
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aim
To investigate the relationship between
and
lengthresistance
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Method of controlling manipulated variable
• Manipulated variable : length
Control : the first length : 15 cm
Measure 15 cm length of wire and connect both end at point A and B
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• Responding variable : resistance
• Measure potential difference using :
Method of measuring responding variable
Measure potential difference using volmeter and calculate the resistance. Record data
voltmeter
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Analyse dataLength / cm
Potential difference / V Resitance / Ω
15
20
25
30
35
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Length
Resistance
cm
Ω
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Cuba soalan muka surat 5
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