IGCSE Sciences - Co-Ordinated (0654) — October–November 2023, Paper 12
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →1 Which statement about the characteristics of living organisms is correct? A Excretion is the removal of excess substances and toxic materials. B Movement is the ability to…
Answer this question and get it marked →2 The diagram shows a beetle. The length of the diagram is 75 mm. The actual length of the beetle is 5 mm. What is the magnification? A 5 B 15 C 80 D 375 3
Answer this question and get it marked →3 A colourless liquid gives the test results shown. test colour obtained Benedict’s blue biuret purple iodine blue / black Which nutrients are in the colourless liquid? A protein,…
Answer this question and get it marked →4 Which type of molecule are enzymes? A carbohydrate B fat C protein D starch
Answer this question and get it marked →5 Which conditions cause the highest rate of transpiration in a plant? temperature wind speed A high high B high low C low high D low low
Answer this question and get it marked →6 Which row provides the greatest amount of the nutrient needed to move food through the alimentary canal? nutrient content / 100 g calcium / mg fibre / g protein / g sugar / g A…
Answer this question and get it marked →7 The rates of water uptake and loss are measured in four leaves. The results are shown in the table. Which leaf is least likely to wilt? rate of water uptake rate of water loss /…
Answer this question and get it marked →8 Small mammals need more energy to maintain a constant body temperature. The graph shows the rate of oxygen used by species of shrews with different body masses. 12 11 10 9…
Answer this question and get it marked →9 The diagram shows a section through the skin. Q P R Which row contains the correct names of the structures labelled P, Q and R? P Q R A sweat gland hair blood vessel B receptor…
Answer this question and get it marked →10 Which diagram shows fertilisation occurring in a flower? A B C D pollen nucleus style ovule nucleus
Answer this question and get it marked →11 Which term describes differences between individuals of the same species? A competition B generation C selection D variation 6
Answer this question and get it marked →12 Which type of organism gets its energy from breaking down dead or waste organic matter? A carnivore B consumer C decomposer D producer
Answer this question and get it marked →13 The concentration of carbon dioxide in the atmosphere has increased during the last 200 years. What has contributed to this increase? A burning large areas of forest B…
Answer this question and get it marked →14 A sample of water contains two useful substances, insoluble chalk and a soluble salt. Which two processes are used to individually separate the insoluble chalk from the soluble…
Answer this question and get it marked →15 Which statement about isotopes of the same element is correct? A They have the same number of protons but different number of electrons. B They have the same number of protons…
Answer this question and get it marked →16 Which equation represents the reaction between aluminium and oxygen? A 2Al + 3O Al 2O3 B Al 2 + 3O Al 2O3 C 2Al 2 + 3O2 2Al 2O3 D 4Al + 3O2 2Al 2O3 7
Answer this question and get it marked →17 Which substance does not undergo electrolysis? A aqueous copper chloride B copper wire C dilute sulfuric acid D molten lead(II) bromide
Answer this question and get it marked →18 To extract a metal from its ore, a metal oxide is mixed with carbon and heated as shown. metal oxide and carbon heat limewater The limewater turns cloudy. Which term describes…
Answer this question and get it marked →19 Solid S is added to dilute hydrochloric acid in the apparatus shown. solid S + dilute hydrochloric acid universal indicator solution The universal indicator solution shows the…
Answer this question and get it marked →20 Which substance is a basic oxide? A calcium oxide B carbon dioxide C nitrogen dioxide D sulfur dioxide
Answer this question and get it marked →21 Which statements about the halogens are correct? 1 They are diatomic metals. 2 Their atoms have seven outer-shell electrons. 3 Going down the group, they change from solid to…
Answer this question and get it marked →22 Which statement explains why argon is used to fill lamps? A It is a gas. B It is colourless. C It is reactive. D It is unreactive. 9
Answer this question and get it marked →23 Aluminium is a ......1...... resource. It is found in the ore bauxite where it is present in aluminium oxide. Pure aluminium is extracted from aluminium oxide by ......2......…
Answer this question and get it marked →24 Which gas is an air pollutant? A argon B carbon dioxide C nitrogen D sulfur dioxide
Answer this question and get it marked →25 Which word equation describes the manufacture of lime from limestone? A calcium carbonate calcium hydroxide + carbon dioxide B calcium carbonate calcium oxide + carbon…
Answer this question and get it marked →26 Which process is used to separate petroleum into useful products? A cracking B filtration C fractional distillation D thermal decomposition 10
Answer this question and get it marked →27 Polymers are long chain molecules made from smaller molecules. What are these smaller molecules called? A alkanes B atoms C components D monomers
Answer this question and get it marked →28 Which row gives the units for mass m and gravitational field strength g ? gravitational mass m field strength g A kg N / kg B kg kg / N C N N / kg D N kg / N
Answer this question and get it marked →29 A solid, rectangular piece of wood measures 8.0 m 1.0 m 0.10 m. The block has a mass of 440 kg. What is the density of the wood? A 55 kg / m3 B 352 kg / m3 C 550 kg / m3 D…
Answer this question and get it marked →30 The weight of a box exerts pressure on the ground. Which pair of changes to the box must reduce the pressure? A decreasing the weight and decreasing the area of the base B…
Answer this question and get it marked →31 A horizontal force acts on a block. The block moves in the direction of the force. Which two quantities affect the work done by the force on the block? A magnitude of force and…
Answer this question and get it marked →32 A gas is contained in a cylinder of constant volume. The gas is cooled. What happens to the speed of the molecules of the gas and to the pressure of the gas? speed of pressure…
Answer this question and get it marked →33 Which statement about the relative thermal expansion of solids, liquids and gases is correct? A Solids expand least, gases expand most. B Solids expand least, liquids expand…
Answer this question and get it marked →34 The amplitude of a sound wave increases, and the frequency of the wave decreases. What is the effect on the loudness of the sound and on the pitch of the sound? loudness pitch…
Answer this question and get it marked →35 A plastic rod is rubbed with a cloth. The rod becomes positively charged. Which statement describes why this happens? A Electrons move from the cloth to the rod. B Electrons…
Answer this question and get it marked →36 What is a current in a metal wire? A a flow of electrons B a flow of ions C a flow of neutrons D a flow of protons
Answer this question and get it marked →37 A lamp is connected in four circuits in turn. The batteries are identical and the resistors are identical. In which circuit is the lamp the brightest? A B C D 13
Answer this question and get it marked →38 The diagrams show a wire carrying a current out of the page. Which diagram shows the pattern of magnetic field lines near the wire? A B C D current out current out current out…
Answer this question and get it marked →39 Which row describes the relative ionising effect and the relative penetrating ability of alpha and gamma radiation? relative relative ionising effect penetrating ability A…
Answer this question and get it marked →40 A radioactive isotope has a half-life of 4.0 days. A sample of the isotope emits radiation at a rate of 100 emissions per minute. What was the rate of emission from the sample…
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