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Science paper J

The document is an instruction booklet for a science practice test that contains 10 multiple choice questions about various science topics. Students are directed to fill out their personal information on an answer sheet and select one answer for each question by filling in the corresponding oval on the answer sheet. The questions cover subjects like biology, chemistry and physics.

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PAPER J ctice s Pra stion Que Inter national DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED. Competitions STUDENT’S NAME: and Assessments for Schools Read the instructions on the ANSWER SHEET and fill in your NAME, SCHOOL and OTHER INFORMATION. Use a 2B or B pencil. Do NOT use a pen. Rub out any mistakes completely. You MUST record your answers on the ANSWER SHEET. Mark only ONE answer for each question. SCIENCE Your score will be the number of correct answers. Marks are NOT deducted for incorrect answers. Use the information provided to choose the BEST answer from the four possible options. On your ANSWER SHEET fill in the oval that matches your answer. You may use a calculator and a ruler.
For questions 1 and 2 use the information below. The graph shows the relationship between muscle fibre length and tension. The shaded band represents the range of muscle lengths that can occur in the body without the muscles detaching from the bones. Percentage of maximum tension 100 80 60 40 20 0 0 20 40 60 80 100 120 140 160 180 Percentage of optimal muscle length 1. Over what percentage of optimal length can a muscle vary without detaching from the bones? (A) 40–60% (B) 60–170% (C) 70–130% (D) 80–140% 2. Which option best summarises the information in the graph? The tension developed by a muscle fibre when it is stimulated (A) increases as the length of the fibre increases from shorter-than-optimal to optimal length, then decreases as the length exceeds optimal. (B) increases as the length of the fibre increases from shorter-than-optimal length, then continues to increase as the length exceeds optimal. (C) decreases as the length of the fibre increases from shorter-than-optimal to optimal length, then decreases again as the length exceeds optimal. (D) decreases as the length of the fibre increases from shorter-than-optimal to optimal length, then increases again as the length exceeds optimal. 3. The two graphs below show what scientists believe were the concentrations of nitrogen and carbon dioxide in the atmosphere between 4 500 million and 2 000 million years ago. 80 80 Carbon dioxide in Earth’s Nitrogen in Earth’s atmosphere (%) atmosphere (%) 60 60 40 40 20 20 0 0 4500 4000 3500 3000 2500 2000 4500 4000 3500 3000 2500 2000 1500 Time (millions of years ago) Time (millions of years ago) There was a time in history when carbon dioxide and nitrogen were present in equal percentages in the atmosphere. At what time did this occur? (A) 2 000 million years ago (B) 3 500 million years ago (C) 4 300 million years ago (D) 4 500 million years ago ICAS Science Practice Questions Paper J © EAA 2
4. Some molecules are mirror images of each other. They cannot be rotated or moved so that one molecule can be superimposed on the other. The models of molecules shown are mirror images of each other. Here is a model of a molecule of 1-iodoethanol. (B) (C) (D) Which model of a molecule below is a mirror image of the one above? (A) (B) (A) (C) (B) (D) (C) (D) 3 ICAS Science Practice Questions Paper J © EAA
For questions 5 and 6 use the information below. In forensic science, blood alcohol content is tested at the time of sampling and, if challenged in court, from a stored sample. A student wanted to know how the tightness of the lid of a screw-topped container affected the loss of alcohol over time. He assumed alcohol behaved the same way in blood and water. He partially filled three containers with equal quantities of 0.1 g L–1 alcohol solution. He then tightened the lids as follows. • loose lid - tighten until resistance is experienced then turn lid back 1 mm. • firm lid - tighten until resistance is just experienced. • tight lid - tighten until resistance is just experienced then turn a further 1 mm forward. The solutions were then stored in a storage cabinet at 30 °C for a number of weeks. His results are shown in the graph. 0.12 Alcohol concentration (g L–1) KEY 0.10 loose firm 0.08 tight 0.06 0.04 0.02 0 Week 0 Week 1 Week 3 Week 5 Week 7 Standing time 5. By how many grams per litre has the concentration dropped after three weeks in the container with the tight lid? (A) 0.005 (B) 0.01 (C) 0.09 (D) 0.095 6. Which hypothesis best applies to this experiment? (A) Blood reacts with alcohol over time. (B) Blood kept in sealed containers should not be used in court. (C) Changes in blood alcohol concentration are due to lid tightness. (D) Changes in temperature affect blood alcohol concentration. ICAS Science Practice Questions Paper J © EAA 4
For questions 7 and 8 use the information below. A frog’s body temperature varies with its surroundings. These two graphs compare the body temperatures of some frogs with the temperature of their surroundings. 40 – 40 – 35 – 35 – Body temperature (°C) Body temperature (°C) 30 – 30 – 25 – 25 – 20 – 20 – 15 – 15 – 10 – 10 – 5– 5– 0– 0– – – – – – – – – – – – – – – – – -5 0 5 10 15 20 25 30 35 -5 0 5 10 15 20 25 30 35 Ground temperature (°C) Air temperature (°C) 7. Each dot represents the measured values taken for each individual frog. The straight line on each graph is called the isothermal line. What does it represent? (A) the dividing line separating the frogs into two equal groups (B) the line joining points where body temperature equals surrounding temperature (C) the ratio of average body temperature to surrounding temperature (D) the average body temperature of frogs at various surrounding temperatures 8. A student drew the following inferences: I More than 50% of frogs have a body temperature higher than the air temperature. II A frog’s body temperature increases as the temperature of its surroundings increases. III The air temperature is lower than ground temperature. Which inference(s) is/are supported by the graphs? (A) I only (B) II only (C) I and II only (D) I, II, and III 5 ICAS Science Practice Questions Paper J © EAA
mass 9. The density of any substance is given by the equation density = volume mass density = volume The graph shows the volume of one gram of 1.0005 water in the temperature range from 0 °C to 10 °C. 1.0005 1.0004 Volume (cm3) When a pond cools, water from the surface 1.0004 1.0003 Volume (cm3) sinks to the bottom because of its greater density. 1.0003 1.0002 As the temperature of the air above the water 1.0002 1.0001 drops below 0 °C, the surface of the water KEY freezes. The temperature of the ice formed 1.0001 1.0000 0 2 4 6 8 10 B = bottom stays at 0 °C as more water freezes. 1.0000 Temperature (°C) KEY = surface S 0 2 4 6 8 10 B = bottom Temperature (°C) S = surface Which of the graphs below shows the temperature at different depths in a pond of water as the surface freezes over? (A) (B) (C) (D) 10. When a liquid in a mixture evaporates, any dissolved solids are left behind. The Soxhlet extractor works very well to extract chlorophyll from leaves using a flammable solvent. There are seven steps in the process. water out condenser 1. The leaves are placed in a sieve. 2. The solvent evaporates and passes up through water in the bypass sidearm. 3. The solvent vapour enters the condenser. 4. The condenser liquefies the solvent which pure solvent is now pure. 5. The liquid drops into the sieve and dissolves reflux sidearm chlorophyll from the leaves. bypass sidearm sieve 6. When the liquid fills up to the top of the reflux sidearm, it is all siphoned back into the flask. 7. Solvent and chlorophyll collect in the flask. The process repeats until the apparatus is flask switched off. solvent + chlorophyll Which of the following statements explains why heat source the Soxhlet extractor works so well? (A) Poisonous or flammable solvents can be used safely. (B) The extracting solvent is always near boiling point. (C) The solvent is constantly purified before re-use. (D) The extracted solute collects in the flask. ICAS Science Practice Questions Paper J © EAA 6
This page may be used For working. 7 ICAS Science Practice Questions Paper J © EAA
Acknowledgment Copyright in this booklet is owned by Educational Assessment Australia, UNSW Global Pty Limited, unless otherwise indicated. Every effort has been made to trace and acknowledge copyright. Educational Assessment Australia apologises for any accidental infringement and welcomes information to redress the situation. The following year levels should sit THIS Paper: Australia Year 12 Brunei Pre-University 2 Malaysia Upper 6 New Zealand Year 13 Pacific Year 12 Singapore Junior College 1 South Africa Grade 12 PAPER J Educational © 2010 Educational Assessment Australia. EAA is an education group of UNSW Global Pty Assessment Limited, a not-for-profit provider of education, THE UNIVERSITY OF NEW SOUTH WALES Australia training and consulting services and a wholly owned enterprise of the University of New eaa.unsw.edu.au South Wales. ABN 62 086 418 582
PaPer J SC Inter national Competitions and Assessments THE UNIVERSITY OF NEW SOUTH WALES for Schools HOW TO FILL OUT THIS SHEET: EXAMPLE 1: Debbie Bach EXAMPLE 2: Chan Ai Beng EXAMPLE 3: Jamal bin Abas FIRST NAME LAST NAME FIRST NAME LAST NAME FIRST NAME LAST NAME • Rub out all mistakes completely. • Print your details clearly A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A in the boxes provided. B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C • Make sure you fill in only D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D one oval in each column. FIRST NAME to appear on certificate LAST NAME to appear on certificate A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B S C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C N D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E IO F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F T G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H S I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I E J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K U L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L Q M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N E O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P C TI Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S C T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T A U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V R W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W P X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / DATE OF BIRTH CLASS Day Month Year (optional) Are you male or female? Male Female *045612* 0 1 0 1 0 1 0 1 0 1 0 1 A B K L Does anyone in your home usually speak a language other than English? 2 2 2 2 2 C M Yes No 3 3 3 3 3 D N 4 4 4 4 E O School name: 5 5 5 5 F P 6 6 6 6 G Q Town / suburb: 7 7 7 7 H R 8 8 8 8 I S Today’s date: Postcode: 9 9 9 9 J T
TO ANSWER THE QUESTIONS Example: Ari added cordial to water to make a jug of drink. What will be the volume of the drink in the jug? (A) 50 mL (B) 150 mL (C) 200 mL (D) 250 mL The answer is 250 mL, so you would fill in the oval , D as shown. A B C D START 1 A B C D 2 A B C D 3 A B C D 4 A B C D 5 A B C D 6 A B C D 7 A B C D 8 A B C D 9 A B C D 10 A B C D PaPer J SC Inter national Competitions Your privacy is assured as EAA fully complies and Assessments with appropriate Australian privacy legislation. for Schools Visit www.eaa.unsw.edu.au for more details.
LEVEL OF QUESTION KEY KEY rEaSONINg DIFFICULTY 1 C The shaded area extends from 70% to 130%. Easy The graph shows that tension increases to 100% of optimal length and once 2 A Easy this length is exceeded (>100%) tension starts to decrease. If the graphs are plotted on the same set of axes, they will cross at 3 C Easy approximately 4 300 million years ago A is identical to the original, so A is wrong. B is the same as A but it is has been flipped and rotated, so B is wrong. C is the same as B but has been 4 D further rotated, so C is wrong. Models A, B and C are all (1R)-1-iodoethanol. Easy Compare D and the original; the blue atom is in a different position. D is a different chemical, and is called (1S)-1-iodoethanol. These are optical isomers. The tight column in the graph shows that after three weeks the concentration in the tight lidded container dropped from 0.10 gL -1 to approximately 0.095 5 A Medium/Hard gL -1 which is a difference of 0.005 gL -1. Please note that the question asks for the difference after three weeks and not seven weeks. In the experiment the tightness of the lid has been altered (loose, firm, and 6 C Easy tight) and change in alcohol concentration was measured. From the graphs, the lines join points where body temperature equals the 7 B Medium/Hard surrounding temperature. Inference I can be drawn from the air-body temperature graph. Inference II can be drawn from both graphs. Inference III is not supported by these graphs 8 C Medium as there is nothing to relate air temperature to ground temperature. Therefore option C is correct. From the volume versus temperature graph, it can be seen that at 0 °C water is less dense than at 4 °C, which is the temperature where water has its maximum 9 B Hard density. This means that the surface of the freezing pond is at 0 °C and the bottom is at 4 °C. Because pure solvent is always entering the sieve dissolving any chlorophyll 10 C remaining in the leaves, the maximum amount of chlorophyll will be extracted Hard from the leaves. ICAS Science Practice Questions Paper J © EAA
LEgEND Level of difficulty refers to the expected level of difficulty for the question. Easy more than 70% of candidates will choose the correct option. Medium about 50–70% of candidates will choose the correct option. Medium/Hard about 30–50% of candidates will choose the correct option. Hard less than 30% of candidates will choose the correct option. ICAS Science Practice Questions Paper J © EAA

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Science paper J

  • 1.
    PAPER J ctice s Pra stion Que Inter national DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED. Competitions STUDENT’S NAME: and Assessments for Schools Read the instructions on the ANSWER SHEET and fill in your NAME, SCHOOL and OTHER INFORMATION. Use a 2B or B pencil. Do NOT use a pen. Rub out any mistakes completely. You MUST record your answers on the ANSWER SHEET. Mark only ONE answer for each question. SCIENCE Your score will be the number of correct answers. Marks are NOT deducted for incorrect answers. Use the information provided to choose the BEST answer from the four possible options. On your ANSWER SHEET fill in the oval that matches your answer. You may use a calculator and a ruler.
  • 2.
    For questions 1 and 2 use the information below. The graph shows the relationship between muscle fibre length and tension. The shaded band represents the range of muscle lengths that can occur in the body without the muscles detaching from the bones. Percentage of maximum tension 100 80 60 40 20 0 0 20 40 60 80 100 120 140 160 180 Percentage of optimal muscle length 1. Over what percentage of optimal length can a muscle vary without detaching from the bones? (A) 40–60% (B) 60–170% (C) 70–130% (D) 80–140% 2. Which option best summarises the information in the graph? The tension developed by a muscle fibre when it is stimulated (A) increases as the length of the fibre increases from shorter-than-optimal to optimal length, then decreases as the length exceeds optimal. (B) increases as the length of the fibre increases from shorter-than-optimal length, then continues to increase as the length exceeds optimal. (C) decreases as the length of the fibre increases from shorter-than-optimal to optimal length, then decreases again as the length exceeds optimal. (D) decreases as the length of the fibre increases from shorter-than-optimal to optimal length, then increases again as the length exceeds optimal. 3. The two graphs below show what scientists believe were the concentrations of nitrogen and carbon dioxide in the atmosphere between 4 500 million and 2 000 million years ago. 80 80 Carbon dioxide in Earth’s Nitrogen in Earth’s atmosphere (%) atmosphere (%) 60 60 40 40 20 20 0 0 4500 4000 3500 3000 2500 2000 4500 4000 3500 3000 2500 2000 1500 Time (millions of years ago) Time (millions of years ago) There was a time in history when carbon dioxide and nitrogen were present in equal percentages in the atmosphere. At what time did this occur? (A) 2 000 million years ago (B) 3 500 million years ago (C) 4 300 million years ago (D) 4 500 million years ago ICAS Science Practice Questions Paper J © EAA 2
  • 3.
    4. Some molecules are mirror images of each other. They cannot be rotated or moved so that one molecule can be superimposed on the other. The models of molecules shown are mirror images of each other. Here is a model of a molecule of 1-iodoethanol. (B) (C) (D) Which model of a molecule below is a mirror image of the one above? (A) (B) (A) (C) (B) (D) (C) (D) 3 ICAS Science Practice Questions Paper J © EAA
  • 4.
    For questions 5 and 6 use the information below. In forensic science, blood alcohol content is tested at the time of sampling and, if challenged in court, from a stored sample. A student wanted to know how the tightness of the lid of a screw-topped container affected the loss of alcohol over time. He assumed alcohol behaved the same way in blood and water. He partially filled three containers with equal quantities of 0.1 g L–1 alcohol solution. He then tightened the lids as follows. • loose lid - tighten until resistance is experienced then turn lid back 1 mm. • firm lid - tighten until resistance is just experienced. • tight lid - tighten until resistance is just experienced then turn a further 1 mm forward. The solutions were then stored in a storage cabinet at 30 °C for a number of weeks. His results are shown in the graph. 0.12 Alcohol concentration (g L–1) KEY 0.10 loose firm 0.08 tight 0.06 0.04 0.02 0 Week 0 Week 1 Week 3 Week 5 Week 7 Standing time 5. By how many grams per litre has the concentration dropped after three weeks in the container with the tight lid? (A) 0.005 (B) 0.01 (C) 0.09 (D) 0.095 6. Which hypothesis best applies to this experiment? (A) Blood reacts with alcohol over time. (B) Blood kept in sealed containers should not be used in court. (C) Changes in blood alcohol concentration are due to lid tightness. (D) Changes in temperature affect blood alcohol concentration. ICAS Science Practice Questions Paper J © EAA 4
  • 5.
    For questions 7 and 8 use the information below. A frog’s body temperature varies with its surroundings. These two graphs compare the body temperatures of some frogs with the temperature of their surroundings. 40 – 40 – 35 – 35 – Body temperature (°C) Body temperature (°C) 30 – 30 – 25 – 25 – 20 – 20 – 15 – 15 – 10 – 10 – 5– 5– 0– 0– – – – – – – – – – – – – – – – – -5 0 5 10 15 20 25 30 35 -5 0 5 10 15 20 25 30 35 Ground temperature (°C) Air temperature (°C) 7. Each dot represents the measured values taken for each individual frog. The straight line on each graph is called the isothermal line. What does it represent? (A) the dividing line separating the frogs into two equal groups (B) the line joining points where body temperature equals surrounding temperature (C) the ratio of average body temperature to surrounding temperature (D) the average body temperature of frogs at various surrounding temperatures 8. A student drew the following inferences: I More than 50% of frogs have a body temperature higher than the air temperature. II A frog’s body temperature increases as the temperature of its surroundings increases. III The air temperature is lower than ground temperature. Which inference(s) is/are supported by the graphs? (A) I only (B) II only (C) I and II only (D) I, II, and III 5 ICAS Science Practice Questions Paper J © EAA
  • 6.
    mass 9. The density of any substance is given by the equation density = volume mass density = volume The graph shows the volume of one gram of 1.0005 water in the temperature range from 0 °C to 10 °C. 1.0005 1.0004 Volume (cm3) When a pond cools, water from the surface 1.0004 1.0003 Volume (cm3) sinks to the bottom because of its greater density. 1.0003 1.0002 As the temperature of the air above the water 1.0002 1.0001 drops below 0 °C, the surface of the water KEY freezes. The temperature of the ice formed 1.0001 1.0000 0 2 4 6 8 10 B = bottom stays at 0 °C as more water freezes. 1.0000 Temperature (°C) KEY = surface S 0 2 4 6 8 10 B = bottom Temperature (°C) S = surface Which of the graphs below shows the temperature at different depths in a pond of water as the surface freezes over? (A) (B) (C) (D) 10. When a liquid in a mixture evaporates, any dissolved solids are left behind. The Soxhlet extractor works very well to extract chlorophyll from leaves using a flammable solvent. There are seven steps in the process. water out condenser 1. The leaves are placed in a sieve. 2. The solvent evaporates and passes up through water in the bypass sidearm. 3. The solvent vapour enters the condenser. 4. The condenser liquefies the solvent which pure solvent is now pure. 5. The liquid drops into the sieve and dissolves reflux sidearm chlorophyll from the leaves. bypass sidearm sieve 6. When the liquid fills up to the top of the reflux sidearm, it is all siphoned back into the flask. 7. Solvent and chlorophyll collect in the flask. The process repeats until the apparatus is flask switched off. solvent + chlorophyll Which of the following statements explains why heat source the Soxhlet extractor works so well? (A) Poisonous or flammable solvents can be used safely. (B) The extracting solvent is always near boiling point. (C) The solvent is constantly purified before re-use. (D) The extracted solute collects in the flask. ICAS Science Practice Questions Paper J © EAA 6
  • 7.
    This page may be used For working. 7 ICAS Science Practice Questions Paper J © EAA
  • 8.
    Acknowledgment Copyright in thisbooklet is owned by Educational Assessment Australia, UNSW Global Pty Limited, unless otherwise indicated. Every effort has been made to trace and acknowledge copyright. Educational Assessment Australia apologises for any accidental infringement and welcomes information to redress the situation. The following year levels should sit THIS Paper: Australia Year 12 Brunei Pre-University 2 Malaysia Upper 6 New Zealand Year 13 Pacific Year 12 Singapore Junior College 1 South Africa Grade 12 PAPER J Educational © 2010 Educational Assessment Australia. EAA is an education group of UNSW Global Pty Assessment Limited, a not-for-profit provider of education, THE UNIVERSITY OF NEW SOUTH WALES Australia training and consulting services and a wholly owned enterprise of the University of New eaa.unsw.edu.au South Wales. ABN 62 086 418 582
  • 9.
    PaPer J SC Inter national Competitions and Assessments THE UNIVERSITY OF NEW SOUTH WALES for Schools HOW TO FILL OUT THIS SHEET: EXAMPLE 1: Debbie Bach EXAMPLE 2: Chan Ai Beng EXAMPLE 3: Jamal bin Abas FIRST NAME LAST NAME FIRST NAME LAST NAME FIRST NAME LAST NAME • Rub out all mistakes completely. • Print your details clearly A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A in the boxes provided. B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C • Make sure you fill in only D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D one oval in each column. FIRST NAME to appear on certificate LAST NAME to appear on certificate A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B S C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C N D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E IO F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F T G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H S I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I E J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K K U L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L Q M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N E O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P C TI Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S C T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T A U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V R W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W P X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / DATE OF BIRTH CLASS Day Month Year (optional) Are you male or female? Male Female *045612* 0 1 0 1 0 1 0 1 0 1 0 1 A B K L Does anyone in your home usually speak a language other than English? 2 2 2 2 2 C M Yes No 3 3 3 3 3 D N 4 4 4 4 E O School name: 5 5 5 5 F P 6 6 6 6 G Q Town / suburb: 7 7 7 7 H R 8 8 8 8 I S Today’s date: Postcode: 9 9 9 9 J T
  • 10.
    TO ANSWER THEQUESTIONS Example: Ari added cordial to water to make a jug of drink. What will be the volume of the drink in the jug? (A) 50 mL (B) 150 mL (C) 200 mL (D) 250 mL The answer is 250 mL, so you would fill in the oval , D as shown. A B C D START 1 A B C D 2 A B C D 3 A B C D 4 A B C D 5 A B C D 6 A B C D 7 A B C D 8 A B C D 9 A B C D 10 A B C D PaPer J SC Inter national Competitions Your privacy is assured as EAA fully complies and Assessments with appropriate Australian privacy legislation. for Schools Visit www.eaa.unsw.edu.au for more details.
  • 11.
    LEVEL OF QUESTION KEY KEY rEaSONINg DIFFICULTY 1 C The shaded area extends from 70% to 130%. Easy The graph shows that tension increases to 100% of optimal length and once 2 A Easy this length is exceeded (>100%) tension starts to decrease. If the graphs are plotted on the same set of axes, they will cross at 3 C Easy approximately 4 300 million years ago A is identical to the original, so A is wrong. B is the same as A but it is has been flipped and rotated, so B is wrong. C is the same as B but has been 4 D further rotated, so C is wrong. Models A, B and C are all (1R)-1-iodoethanol. Easy Compare D and the original; the blue atom is in a different position. D is a different chemical, and is called (1S)-1-iodoethanol. These are optical isomers. The tight column in the graph shows that after three weeks the concentration in the tight lidded container dropped from 0.10 gL -1 to approximately 0.095 5 A Medium/Hard gL -1 which is a difference of 0.005 gL -1. Please note that the question asks for the difference after three weeks and not seven weeks. In the experiment the tightness of the lid has been altered (loose, firm, and 6 C Easy tight) and change in alcohol concentration was measured. From the graphs, the lines join points where body temperature equals the 7 B Medium/Hard surrounding temperature. Inference I can be drawn from the air-body temperature graph. Inference II can be drawn from both graphs. Inference III is not supported by these graphs 8 C Medium as there is nothing to relate air temperature to ground temperature. Therefore option C is correct. From the volume versus temperature graph, it can be seen that at 0 °C water is less dense than at 4 °C, which is the temperature where water has its maximum 9 B Hard density. This means that the surface of the freezing pond is at 0 °C and the bottom is at 4 °C. Because pure solvent is always entering the sieve dissolving any chlorophyll 10 C remaining in the leaves, the maximum amount of chlorophyll will be extracted Hard from the leaves. ICAS Science Practice Questions Paper J © EAA
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    LEgEND Level of difficulty refers to the expected level of difficulty for the question. Easy more than 70% of candidates will choose the correct option. Medium about 50–70% of candidates will choose the correct option. Medium/Hard about 30–50% of candidates will choose the correct option. Hard less than 30% of candidates will choose the correct option. ICAS Science Practice Questions Paper J © EAA