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

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ICAS Science Practice Questions Paper F © EAA 2 1. 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 For questions 2 and 3 use the information below. The following flow chart can be used to distinguish between 12 elements. elements O                                   

3 ICAS Science Practice Questions Paper F © EAA 2. Gold is a yellow metallic solid that is not attracted to magnets. According to this flow chart, which letters could correspond to gold? (A) O or P (B) P or Q (C) Q or R (D) S or T 3. Element Y is sulfur and element X is carbon. Which feature is used in the key to distinguish between them? (A) Carbon is black and sulfur is yellow. (B) Carbon is a conductor and sulfur is an insulator. (C) Carbon is a gas and sulfur is not a gas. (D) Sulfur burns with a flame and carbon glows red hot. 4. The lower the resistivity, the better the metal’s ability to conduct electricity. The graph shows the resistivity of several metals. LURQ 5HVLVWLYLW\���� ±�� �P� QLFNHO PDQJDQHVH SODWLQXP FRSSHU ���� ��� ��� ��� ��� ��� ��� �� �� �� �� � Which metal is the poorest conductor at 400 °C? (A) copper (B) iron (C) manganese (D) platinum

ICAS Science Practice Questions Paper F © EAA 4 5. 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  For questions 6 and 7 use the information below. The diagram shows the sizes of some deep-sea sediments. 100 10 10∙1 0∙01 0∙001 2 0∙062 0∙004 6. Which sediment is likely to completely pass through a sieve with mesh size 0.1 mm? (A) coccoliths (B) radiolaria (C) diatoms (D) pteropods 7. Which sediments would be hardest to separate from each other using sieves? (A) whales’ ear bones and shark’s teeth (B) radiolaria and sponge spicules (C) silicoflagellates and pteropods (D) diatoms and pteropods

5 ICAS Science Practice Questions Paper F © EAA 8. The table shows characteristics of some mineral gemstones. Gem Composition Colour(s)HardnessLustre emerald beryllium aluminium silicate dark green7.5 – 8glass-like sapphire aluminium oxide blue9diamond-like pyrope magnesium aluminium silicate dark red6.5 – 7.5diamond-like white opal anhydrous silicone dioxide white with play of colours4.5 – 6.5glass-like kunzite lithium aluminium silicate pink to violet6.5 – 7glass-like ruby magnesium aluminium oxide dark red7.5 – 8glass-like matara zirconium silicate colourless6.5 – 7.5diamond-like Anne chose a characteristic and divided the gemstones into two groups according to that characteristic. Jack chose a different characteristic and did the same thing. Here are their groups. Anne’s groups Jack’s groups Group 1 Group 2 Group 1Group 2 emerald, pyrope, kunzite, matara sapphire, white opal, ruby emerald, kunzite, white opal, ruby sapphire, pyrope, matara Which characteristic did Anne and Jack each use to put the gems into these groups? Anne Jack (A) hardness lustre (B) hardness colour (C) composition lustre (D) composition colour

ICAS Science Practice Questions Paper F © EAA 6 For questions 9 and 10 use the information below. Reports about science experiments often include: • a title • an introduction • an aim • a method of how the experiment was to be carried out • results (what was observed) • a discussion of the results • a conclusion A student wrote a report containing a number of points. honey time = 0 seconds time = 1 second oil water honey oilwater 1)   "Which liquid is th\ue most viscous\b" 2)  The viscosity of th\ue liquid is how "th\uick" it is.  The more viscous the\u liquid, the slower\u the marble    will pass through it\u . 3)  To determine the most \uviscous: honey , oil or water. 4)  Set up three identic\ual jars filled with\u the dif ferent liquids. 5)  Drop a marble in eac\uh jar at the same t\uime and record the m\uarble's position af\uter one second. 6) 7)  The marble in the h\uoney was near the \utop of the jar whil\ue the marble in the\u water   was at the bottom o\uf the jar . 8)  Water was the most vi\uscous liquid tested.\u   Conclusion correct?\R                    \R              Reaso\Rn (A)  no  The marble went thr\uough the water the \uslowest. (B)  yes  The marble went thr\uough the water the \uslowest . (C)  yes  The marble went thr\uough the honey the \uslowest . (D)  no  The marble went thr\uough the honey the \uslowest . 9. Which points are the student’s results? (A) 4 and 5 (B) 5 and 6 (C) 6 and 7 (D) 7 and 8 10. Was the student’s conclusion correct? Why? Conclusion correct? Reason (A) noThe marble went through the water the slowest. (B) yesThe marble went through the water the slowest. (C) yesThe marble went through the honey the slowest. (D) noThe marble went through the honey the slowest.

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ICAS Science Practice Questions Paper F © EAA QUESTIONKEYKEY rEa SONINg LEVEL OF DIFFICULTY 1 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 2 CStart at the top. Gold is a metal, solid, is not magnetic and not silver coloured, so it could be either Q or R, depending on its reactivity. Easy 3 BFrom the flow chart, both sulphur and carbon are non-metals, not a gas, but one of them is a conductor and the other an insulator. Black is not in the key, so A is wrong. Carbon is a solid, so C is wrong. How they burn is not in the key, so D is wrong. Easy 4 CThe graph shows the resistivity of some metals; the lower the resistivity the better the conductor. The question asks to identify the poorest electrical conductor, which means the one with the highest resistivity. At 400 °C, the metal with the highest resistivity, and is therefore the poorest conductor, is manganese. Medium 5 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 6 ATo completely pass through a sieve with a mesh size 0.1 mm, the sediments must be smaller than 0.1 mm. Of the four sediments listed only coccoliths ar e completely smaller than 0.1 mm (0.1 mm < size of coccolith < 0.004 mm). Medium/Hard 7 BIf the sediments are similar in size they would be difficult to separate using sieves. The greater percentage of overlap, the more difficult they would be to separate with a sieve. The greatest percentage of overlap occurs between radiolaria and sponge spicules. Medium/Hard 8 CAccording to the table, Anne’s group 1 gemstones are all silicates and her group 2 gemstones are all oxides. Therefore she has grouped the gemstones according to their composition. Jack’s group 1 gemstones are all glass-like, and his group 2 gemstones are all diamond-like. Therefore he has grouped the gemstones according to their lustre. Medium/Hard 9 CResults are ‘observations’ made using our five senses, particularly sight. We can see the marbles above the jars at time = 0 s, and we can see the jars with the marbles in them at t = 1 s, at different positions within the liquids. So point 6 and point 7 of the report are observations. Note that which liquid is the most or least viscous is an inference which is based on observations. It itself is not an observation. Medium/Hard 10 DThe more viscous the liquid, the slower the marble will pass though it. After 1 s the slowest marble will have moved the smallest distance. This occurs in honey; therefore, it is the most viscous of these liquids. Medium/Hard

ICAS Science Practice Questions Paper F © 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.