NSW INDEPENDENT TRIAL EXAMS – 2012
SCIENCE – Yr 10 EXAMINATION
MARKING GUIDELINES
Section I
Part A
1
2
D
C
3
B
4
A
5
A
6
D
7
B
8
A
9
B
10
D
11
A
12
C
13
C
14
B
15
B
16
B
17
A
18
D
19
C
20
D
21
A
22
D
23
B
24
D
25
C
26
C
27
A
28
B
29
A
30
D
31
C
32
B
33
C
34
D
35
A
36
B
37
C
38
B
39
A
40
A
41
C
42
B
43
C
44
B
45
C
46
A
47
D
48
C
49
A
50
B
Part B
Qu
Criteria
51 Mass
52 Infectious
53 2.7A (2.65-2.9 range)
54 Convection currents in the mantle
55 33-34%
56 Weight
57 Conical flask
58 Sterilisation of medical equipment
59 Hypothesis
60 −52° - 57°C range
Marks
1
1
1
1
1
1
1
1
1
1
Section II
Question 61(a)
Criteria
 Provides a suitable method including the following: suitable labelled containers,
volume of water, temperature of water, volume of detergent, time for shaking, suitable
size controls and variables
 Provides a suitable method with FOUR of the following: suitable container, volume of
water, temperature of water, volume of detergent, time for shaking, suitable size
controls and variables
 Provides a suitable method with THREE of the following: suitable container, volume
of water, temperature of water, volume of detergent, time for shaking, suitable size
controls and variables
 Provides a method with TWO of the following: suitable container, volume of water,
temperature of water, volume of detergent, time for shaking, suitable size controls and
variables
Sample answer:
1. Label 4 test tubes with the names of the different detergents.
2. Fill a beaker with water at a temperature of 50°C and add 60 mL to each test tube.
3. Add 1 mL of each liquid to the labelled test tube.
4. Place a stopper in each test tube.
5. Shake each test tube for 30 seconds, timed by a stopwatch.
6. Measure the height of the bubbles above the water level in each test tube.
Marks
4
3
2
1
NSW Independent Trial Exams 2012 – Year 10 Examination: Marking Criteria – Page 1
Question 61(b)
Criteria
Marks
1
 Identifies ONE precaution
Sample answer: Wear safety glasses to avoid detergent splashing into eyes. Wear gloves because detergent
may be a skin irritant/alkaline
Question 61(c)
Criteria
 Describes one possible problem
Sample answer: The whole test tube could fill with bubbles for each detergent.
Question 62(a)
Criteria
 Draws a neat ruled circuit diagram with parallel globes, separate switches and battery,
using correct symbols
 Draws a circuit diagram with parallel globes, separate switches and battery, using
correct symbols OR a ruled circuit with series globes, switches and battery using
correct symbols
 Draws a picture of the components of the correct circuit or an incorrect circuit diagram
with three correct symbols
Sample answer:
Question 62(b)
 Provides straight line graph through origin i.e. V= r I
Sample answer:
Marks
1
Marks
4
2-3
1
1
Applied voltage
(V)
Current flowing
(A)
Question 62(c)
3
 Identifies which property of water from a tap compares to current, voltage and
resistance
2
 Identifies which property of water from a tap compares to TWO of the following:
current, voltage, resistance
1
 Identifies which property of water from a tap compares to ONE of the following:
current, voltage, resistance
Sample answer: Imagine water flowing out of a tap. The water represents the current flow, and the voltage is
represented by the pressure behind the water flow from the reservoir. The resistance of the circuit is
represented by how far the tap is turned on.
NSW Independent Trial Exams 2012 – Year 10 Examination: Marking Criteria – Page 2
Question 63(a)(i)
2
 Identifies correct and incorrect aspects of statement
1
 Identifies correct OR incorrect aspect of statement
Sample answer: By end of period, pharmaceutical A has killed all bacteria so is most effective, but initially
pharmaceutical B is more effective. Thus the statement needs to be qualified.
Question 63(a)(ii)
1
 Identifies statement as incorrect and provides reason
Sample answer: The results do not provide any information about the effect of either pharmaceutical on
patients, only on the bacteria so it is incorrect.
Question 63(b)
1
 Provides a reason
Sample answer: The bacteria may have acquired resistance to the antibiotic and thus the resistant bacteria
have multiplied.
Question 64(a)
2
 Provides resource name and use
1
 Provides resource name OR use
Sample answer: Iron ore is processed to produce steel which is used in car bodies and buildings.
Question 64(b)
2
 Provides TWO properties of economically important resources
1
 Provides ONE property of economically important resources
Sample answer: The resource must be concentrated enough to warrant the cost of extracting it and contain a
compound or element that has useful applications. Must also be accessible for extraction.
Question 65
4−5
 Discusses the older and replacement theory or model, and reasons for their acceptance
and rejection
2−3
 Describes the older and replacement theory or model
1
 Identifies a theory or model
Sample answer: The earliest models of the universe presented by Greek philosophers had the Earth at the
centre and the Sun, Moon and stars and planets moving around the Earth. Their ideas were based on the
simple observation of the Sun rising and setting and on the belief that the Earth and man were the centre of
the universe. Another early philosopher named Copernicus disagreed, but there was no evidence available to
decide which model was correct. As a result, the earth-centred model was developed so well that it was used
by navigators and accepted by the Catholic Church.
Using measurements made in the 16th century, the Sun-centred model was again considered and finally the
observations made by Galileo using his telescope provided more convincing evidence that the best model of
the universe was sun-centred.
NSW Independent Trial Exams 2012 – Year 10 Examination: Marking Criteria – Page 3
Question 66(a)
Criteria
 Plots points correctly and draws a ‘curve of best fit’
 Plots points correctly OR draws a curve
Sample answer:
Marks
2
1
50
45
40
velocity (ms)
35
30
25
20
15
10
5
0
0
1
2
3
4
5
6
7
Tim e (s)
Question 66(b)
Criteria
 Provides a velocity based on their graph
Sample answer: 3.5-4.5 ms−1 range
Marks
1
Question 66(c)
Criteria
 Provides a velocity based on the extension of their graph
Sample answer: 35 - 50 ms−1 range
Marks
1
Question 66(d)
Criteria
Marks
1
 Provides a reason for the greater accuracy of answer (b)
Sample answer: (b) will be more accurate because it is an estimate between measured points. Estimate (c)
requires the trend in the graph to continue unchanged, and it may not.
Question 66(d)
Criteria
 Provides correct term describing motion
Sample answer: It is accelerating
Marks
1
NSW Independent Trial Exams 2012 – Year 10 Examination: Marking Criteria – Page 4
Question 67
Criteria
Marks
6−7
 Provides a well ordered, logical discussion of how evolution is based on natural
selection and THREE areas of evidence
 May include points against
4−5
 Provides a discussion of how evolution is based on natural selection and TWO areas of
evidence
 May include points against
2−3
 Provides a discussion of how evolution is based on natural selection and ONE area of
evidence
 May include points against
1
 Provides ONE area of evidence or identifies natural selection as survival of the fittest
Sample answer: The theory is based on natural selection through survival of the fittest. A classic example is
the change in the increase in the number of dark coloured moths versus pale moths during the industrial
evolution. The dark moths became more camouflaged and less were eaten by predators. As a result there
were more dark moths bred than white moths.
The fossil record provides much evidence. Scientists have studied the fossil remains of a very old fish which
had fins they believe were strong enough for it to ‘walk” in shallow water. Its skeleton had features similar to
those of early four legged land animals and amphibians are believed to have evolved from such species of
fish. The fossil record shows that organisms have gradually changed over time. Similar species share a
common place and time in the fossil records.
DNA analysis of organisms provide further evidence. It shows that we can group species by similarity of
genes. These groups even share unused DNA. For example, there is a great similarity between the DNA of
humans and chimpanzees. The study of the embryos of different animals are very similar at early stages. All
vertebrates initially have gill slits associated with fish. This is believed to be due to having a common
ancestor.
It can be seen that today there is much evidence to support Darwin’s theory of evolution and therefore it is
accepted by a great majority of scientists.
NSW Independent Trial Exams 2012 – Year 10 Examination: Marking Criteria – Page 5
NSW INDEPENDENT TRIAL EXAMS – 2012
SCIENCE Yr 10 EXAMINATION
MAPPING GRID
Question
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Marks
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Content
5.8.4a
5.9.3b
5.7.3f
5.6.1
5.9.4f
5.9.2a
4/5.17g
5.11.2b
4/5.15a, 5.6.1b
5.6.1
4/5.16c
4/5.19b
4/5.17b, 4/5.17f
5.7.1a
4/5.5b
4/5.16b
5.12d
4/5.19a
5.9.1b, 5.9.3a
5.9.1c
5.7.3d
5.7.3e
4/5.13.2b
4/5.13.f
4/5.21b
4/5.19d
4/5.21b
4/5.18f
5.9.1a, 4/5.2d
5.8.4a
5.12b, 5.12c, 4/5.4d
5.10c
4/5.16c
4/5.19b
5.7.2b
5.6.2a, 4/5.17g
5.7.3
5.9.4
5.8.3b
5.8.2c
4/5.19c
4/5..14e, 4/5.21e
4/5.17g
5.8.4c
4/5.17f
5.6.4
4/5.3d
4/5.19d, 4/5.19g
Syllabus
Outcomes
5.8
5.9
5.7
5.6
5.9
5.9
4/5.17
5.11
4/5.15, 5.6
5.6
4/5.16
4/5.19
4/5.17
5.7
4/5.5
4/5.16
5.12
4/5.19
5.9
5.9
5.7
5.7
4/5.13
4/5.13
4/5.21
4/5.19
4/5.21
4/5.19
5.9, 4/5.2
5.8
5.12, 4/5.4.
5.10
4/5.16
4/5.19
5.7
5.6, 4/5.17
5.7
5.9
5.8
5.8
4/5.19
4/5.14, 4/5.21
4/5.17
5.8
4/5.17
5.6
4/5.3
4/5.19
K/S
K
K
K
K
K
K
S
K/S
K/S
K/S
S
S
S
K
S
S
S
S
K
K
K
K
S
S
S
S
S
S
K
K
K
K
S
S
K
K/S
K
K
K
K
S
S
S
K
S
K
K
S
Targeted
Bands
2-3
3-4
2-3
3-4
2-3
3-4
4-5
4-5
2-3
3-4
3-4
4-5
2-3
2-3
3-4
2-3
3-4
3-4
3-4
3-4
2-3
3-4
3-4
3-4
3-4
4-5
4-5
4-5
4-5
3-4
5-6
3-4
2-3
5-6
4-5
4-5
3-4
3-4
3-4
3-4
4-5
3-4
3-4
3-4
4-5
2-3
3-4
5-6
NSW Independent Trial Exams 2012 – Year 10 Examination: Marking Criteria – Page 6
NSW INDEPENDENT TRIAL EXAMS – 2012
SCIENCE Yr 10 EXAMINATION
MAPPING GRID – cont’d
Question
49
50
51
52
53
54
55
56
57
58
59
60
61(a)
61(b)
61(c)
62(a)
62(b)
62(c)
63(a)(i)
63(a)(ii)
63(b)
64(a)
64(b)
65
66(a)
66(b)
66(c)
66(d)
66(e)
67
Marks
Content
1
4/5.19b, 4/5.19c
1
4/5.13.2a
1
5.6.6
1
5.8.4
1
4/5.15a
1
5.9.4d
1
4/5.16c
1
5.6.6
1
4/5.13.3b
1
5.6.1c
1
4/5.2c
1
4/5.17g
4
4/5.13.2c
1
4/5.13.3c
1
4/5.14e
4
5.6.3a,d
1
5.6.3c
3
5.6.3b
2
4/5.21b
1
4/5.21b
1
4/5.21f
2
5.11.1b
2
5.11.1b
5
4/5.1b
2
4/5.17d, 4/5.18e
1
4/5.16e
1
4/5.16e
1
4/5.19d
1
5.6.6
7
5.8.3a,b, 4/5.2c, 4/5.18a, 4/5.19b
Syllabus
Outcomes
4/5.19
4/5.13
5.6
5.8
4/5.15
5.9
4/5.16
5.6
4/5.13
5.6
4/5.2
4/5.17
4/5.13
4/5.13
4/5.14
5.6
5.6
5.6
4/5.21
4/5.21
4/5.21
5.11.1
5.11.1
4/5.1
4/5.17, 4/5.18
4/5.16
4/5.16
4/5.19
5.6
5.8.3, 4/5.2, 4/5.18,
4/5.19
K/S
S
S
K
K
S
K
S
K
S
K
K
S
S
S
S
K
K
K
S
S
S
K
K
K
S
S
S
S
K
K/S
Targeted
Bands
5-6
5-6
3-4
2-3
3-4
3-4
3-4
2-3
2-3
2-3
4-5
5-6
2-5
3-4
4-5
4-5
5-6
3-4
3-4
3-4
4-5
2-3
3-4
5-6
3-5
3-4
5-6
5-6
3-4
4-6
NSW Independent Trial Exams 2012 – Year 10 Examination: Marking Criteria – Page 7