[PDF] ICAS Practice Questions Science Paper E.pdf | Plain Text

E PAPER DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED. STUDENT’S NAME: Read the instructions on the ANSWER SHEET and fill in your NAME, SCHOOL and OTHER IN\bORMATION. Use a 2B or B pencil. Do NOT use a pen. Ru\b out any mistakes completely. You MUST record your answers on the ANSWER SHEET. SCIENCE Mark only ONE answer for each question. Your score will \be the num\ber of correct answers. Marks are NOT deducted for incorrect answers. Use the information provided to choose the BEST answer from the four possi\ble options. On your ANSWER SHEET fill in the oval that matches your answer. You may use a calculator and a ruler. I n t e r n a t i o n a l C o m p e t i t i o n s and Assessments for Schools Practice Q uestions

ICAS Science Practice Questions Paper E © EAA 2 1. The following is a false-coloured imaging photograph of a manta ray and a scientist’s boat. The length of the scientist's boat is two metres. What is the wingspan in metres of the manta ray? (A) 2.1 (B) 2.3 (C) 3.1 (D) 4.5 2. Mercury has a diameter of 4 900 km. Earth’s moon has a diameter of 3 500 km. The flow chart distinguishes between eight inner satellites of the planet Jupiter. Is its diameter eq\'ual to or greater \'than Earth's moon? Satellites orbiting\' Ju\biter Is it made of dens\'e rock? Is its diameter le\'ss than 50 km? Io Euro\ba Thebe Ganymede AdrasteaAmalthea Callisto Metis yes yes yes yes yes yes no no no no no no yes no Is its diameter greater than the diameter of Mercur\'y ? Is it the most volcanic object in the solar system? Is it s\bherical in sha\be? Is it longer than200 km in its largest dimension? One of Jupiter’s inner satellites has a diameter of 4 800 km and is not made of dense rock. Which satellite is this? (A) Io (B) Europa (C) Ganymede (D) Callisto

3 ICAS Science Practice Questions Paper E © EAA 3. Matter can exist as a solid, liquid or gas. The state can be changed by varying the temperature. For each change of state, different terms are used. These are shown in the diagram. solid gas melting freezing liquid evaporatio n condensatio n deposition sublimatio n If dry ice (solid carbon dioxide) is heated and directly changed to carbon dioxide gas, this is called (A) melting then evaporation. (B) sublimation. (C) evaporation. (D) deposition. 4. The table shows the characteristics that some flowers have to attract animals. Animal The characteristics of flowers that mainly attract the animal Size ColourSmell/odour bee smallbright blue or yellow – beetle largewhitespicy or foul butterfly smallwhite – bird largered or yellow – bat large white fruity The key classifies 5 flowers: I, II, III, IV and V. Flower Size small white white red or yellow bright blue or yellow II V I IV III large Colour Colour fruity spicy or foul Odour Which animal would be attracted to flower I and which would be attracted to flower IV? I IV (A) bird beetle (B) bee bird (C) bird bee (D) bee bat

ICAS Science Practice Questions Paper E © EAA 4 5. An animal that is threatened with extinction is endangered. The mallee fowl is a native animal that is endangered. Foxes, rabbits, cats and sheep are animal species introduced to Australia by humans. Introduced species can endanger native animals. The introduced species may be predators, or compete with native animals for available food. The diagram shows the main food web for a mallee fowl habitat. kangaroos nss os ras aos as nas ags s KEY  anssan\       \  naskangaroo\ srasans\  nsskangaroos\ rasans\  rasans rasans  agsosan\ as osanas osanas agsosan\ as anara grasssss ors kangaroos nss os ras aos nas ags s anara grasssss ors KEY  anssan\   as What is the purpose of the text box colour coding in the food web? The colours distinguish between (A) endangered species and introduced species. (B) native species and introduced species. (C) plants, plant eaters and meat eaters. (D) plants, animals and insects. 6. The graph shows the average distance from the Sun and the average daytime temperature for some planets in the solar system. KEY average distance f\lrom Sun (million km ) average da time tem\l erature ( ) ercur enus \    art ars Generally, the further a planet is from the Sun, the colder will be its average daytime temperature. According to the graph, which planet does not follow this trend? (A) Mercury (B) Venus (C) Earth (D) Mars

5 ICAS Science Practice Questions Paper E © EAA 7. Peter has four types of string that he labels W, X, Y and Z. The diagram shows the maximum weight that each can support without breaking. Z  Y  X  Z  X  Y  Y  X  W  3 k g  3 kg  5 kg  3 kg  5 kg  5 kg  3 kg  5 kg  1 kg  1 kg  10 k g  5 kg Z  Y  X  W  X  Y  Z  1 kg  3 kg  5 k g  10 k g  In which diagram will all the st\orings remain unbroken? (A\b \o \o (B\b \o \o (C\b\o \o \o (D\b Z  Y  X  Z  X  Y  Y  X  W  3 k g  3 kg  5 kg  3 kg  5 kg  5 kg  3 kg  5 kg  1 kg  1 kg  10 k g  5 kg Z  Y  X  W  X  Y  Z  1 kg  3 kg  5 k g  10 k g 

ICAS Science Practice Questions Paper E © EAA 6 For questions 8 and 9 use the information below. The diagrams show three methods that are commonly used to collect gases. lid air gas lid air gas gas water gas collected Gas Soluble in water Smell ammonia oxygen hydrogen methane carbon dioxide yes no no no yes Mass compared to eq\pual volume of air less equal less less more strong none none none none (A\b (B\b (C\b (D\b Met\bod 1 Met\bod 2 Met\bod 3 method 1 method 3 method 2 method 1 Carbon dioxide method 2 method 2 method 3 method 2 Hydrogen method 2 method 2 method 1 method 2Oxygen method 3 method 1 method 3 method 1 Ammonia Some colourless gases and their properties are shown. Gas Soluble in water Mass compared to equal volume of air Smell ammonia oxygen hydrogen methane carbon dioxide yes no no no yes less equal less less more strong none none none none 8. What are the best methods for collecting some of these gases? Carbon dioxide HydrogenOxygenAmmonia (A) method 1 method 2method 2method 3 (B) method 3 method 2method 2method 1 (C) method 2 method 3method 1method 3 (D) method 1 method 2method 2method 1 9. A student wished to collect methane gas using method 3. What would be her biggest problem? (A) getting the methane to stay in the flask (B) knowing when the flask is full (C) preventing the methane from igniting (D) avoiding the strong smell of methane

7 ICAS Science Practice Questions Paper E © EAA 10. Aquatic environments have a number of sources of pollutants. Pollutants from point sources come from specific places that can be easily identified and controlled. Non-point sources of pollutants are widespread, usually covering a large area and cannot be easily measured or identified. The following table identifies some types of pollutants and their sources. Pollutant pathogens (bacteria and viru\)ses) toxicants (heavy metals and p\)esticides) sediments nutrients (nitrates and phos\)phates) salinity heat \bines     W astewater treatment plants Stormwater     Agriculture      Point sources Non-point sources    Which statement is correct according to the information in the table? (A) Wastewater treatment plants are non-point sources of toxicant and nutrient pollution. (B) All listed sources of pollutants release sediment and pathogens into aquatic environments. (C) Mines and agriculture release the largest volume of pollutants into aquatic environments. (D) While the table shows different pollution sources, the volume of each pollutant is not shown.

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ICAS Science Practice Questions Paper E © EAA QUESTIONKEYKEY rEa SONINg LEVEL OF DIFFICULTY 1 DThe image of the boat is 20 mm and the image of the wingspan of the manta ray is 43 mm. If the boat is actually 2.0 m long then the wingspan is 4.3 m. The best answer is D. (Note that some printers may distort the images.) Easy 2 DStart at the top of the diagram. The satellite’s diameter of 4 800 km is gr eater than the diameter of the Earth’s moon (3 500 km), but less than Mer cury’s diameter of 4 900 km. Easy 3 BAs carbon dioxide changes directly from solid to gas, bypassing the liquid state, sublimation is the correct answer. Medium 4 DThe table identifies the characteristics of flowers that attract particular animals. The key classifies some flowers according to their characteristics. To arrive at the correct answer you must match the characteristics from the key to those given in the table. Easy 5 CPlant material is coded green. Things that eat plants are coded purple while things that eat animals only are coded orange. Rabbits (introduced) and mallee fowls (native) are both coded purple, so A and B are wrong. Cats and rabbits are animals but are coded with different colours, so D is wrong. Producers are coded green, herbivores or omnivores are coded purple and carnivores are coded orange. Medium 6 BTo answer the question, we have to ask the following: as the spotted graph goes up (increasing distance away from the Sun), does the purple graph (average daytime temperature) always go down? The average daytime temperature of Venus is higher (not lower) than Mercury’s average daytime temperature even though it is further from the Sun. It should be noted that the daytime temperature of Mars is below Earth’s daytime temperature. Medium/Hard 7 DFor the strings to remain unbroken, the strength of each string must exceed the mass it is required to support. That is, the top string must be capable of supporting the total mass of the three weights, the middle string must be capable of supporting the mass of the two weights beneath it, and the bottom string must be capable of supporting the mass of the bottom weight. This occurs only in option (D), where string Z (capable of supporting 10 kg) is supporting three weights with a total mass of 9 kg, string Y (capable of supporting 5 kg) is supporting two weights with a total mass of 4 kg, and string X (capable of supporting 3 kg) is supporting a mass of 1 kg. Medium/Hard 8 AAs carbon dioxide is soluble in water, method 2 will not work; and as it is also denser than air method 3 will not work – leaving method 1, for collecting carbon dioxide, options A or D. As ammonia is less dense than air , method 3 is the best method to collect it, therefore A is the answer. Hard 9 BAs methane has no smell, D is wrong. Because methane is less dense than air it will float upwards, so A is wrong. While methane is flammable this will not hinder getting methane into the flask, so C is wrong. Medium/Hard 10 DWhile the table shows different pollution sources, the volume of each pollutant is not shown. Wastewater treatment plants are point sources of pollution, so A is wrong. According to the table, wastewater treatment plants do not release sediments, so B is wrong. The table only shows the type of pollution and its source; there is no information in the table that shows the correct volume of pollution produced, so C is wrong and D is correct. Medium/Hard

ICAS Science Practice Questions Paper E © 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.