IGCSE Science - Combined (0653) — May–June 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 →Which process removes toxic materials from an organism? A digestion B egestion C excretion D respiration
Answer this question and get it marked →The diagram shows a cell as seen with a microscope. Which label is correct? B chloroplast A vacuole C cell membrane D cytoplasm
Answer this question and get it marked →The table shows the results of tests carried out on a food. name of test colour obtained iodine brown Benedict’s orange biuret blue Which nutrients does the food contain? reducing…
Answer this question and get it marked →The table shows the time taken for an enzyme-controlled reaction to be completed at different pH values. pH 6 7 8 9 time taken for reaction 170 150 120 100 to be completed / s At…
Answer this question and get it marked →In which order does food pass through parts of the alimentary canal? A oesophagus → anus → large intestine B small intestine → oesophagus → stomach C small intestine → large…
Answer this question and get it marked →A sample of blood is taken from a person who often gets infections. The blood is also slow to clot. Which blood components are likely to be at a lower level than normal? 1…
Answer this question and get it marked →From which lung structure does oxygen pass into the blood? A alveoli B bronchi C bronchioles D trachea
Answer this question and get it marked →Which word is missing from the word equation for respiration? .................... + oxygen → carbon dioxide + water A glucose B glycogen C protein D starch
Answer this question and get it marked →Which physical changes occur in response to a fear stimulus? adrenaline concentration pulse rate size of pupil in the blood A decreases increases narrower B decreases decreases…
Answer this question and get it marked →Which word describes the growth of a plant towards light? A gravitropism B movement C photosynthesis D phototropism
Answer this question and get it marked →Which row describes asexual reproduction? number of offspring genetically parents involved identical to each other A 1 yes B 1 no C 2 yes D 2 no
Answer this question and get it marked →The diagram shows a section through an insect-pollinated flower. Which labels are correct? anther petal sepal stigma A 1 3 4 2 B 1 4 3 2 C 2 3 4 1 D 2 4 3 1
Answer this question and get it marked →What is the journey of a sperm cell during sexual intercourse? A testis → urethra → uterus → oviduct B testis → urethra → oviduct → uterus C urethra → sperm duct → uterus → vagina…
Answer this question and get it marked →The formulae of three substances are shown. substance formula methane CH4 water H2O oxygen O2 Which statement is correct? A Methane is made from five different types of atom. B…
Answer this question and get it marked →What is the definition of nucleon number? A the number of protons in an atom B the number of electrons in an atom C the total number of electrons and neutrons in an atom D the…
Answer this question and get it marked →Which structure represents an ionic compound? A B C D + – H H H Li F H C C C H Cl Cl H H H
Answer this question and get it marked →A mixture of six gas molecules is shown. O C O O O C O O O C O O C O Which statement about the mixture is correct? A It contains carbon dioxide and oxygen only. B It contains…
Answer this question and get it marked →Molten lead(II) bromide is electrolysed using inert electrodes. What are the products at each electrode? anode cathode A bromide ions lead B bromine gas lead C lead bromine gas D…
Answer this question and get it marked →The initial and final temperatures of four different reactions are measured. The results are shown. Which reaction is the most exothermic? initial final temperature temperature /…
Answer this question and get it marked →In which reactions is the underlined substance oxidised? 1 iron when it rusts 2 methane when it burns in air 3 copper oxide when it reacts with carbon A 1, 2 and 3 B 1 and 2 only…
Answer this question and get it marked →Dilute sulfuric acid reacts with aqueous potassium hydroxide. What are the products of this reaction? potassium hydroxide potassium sulfate carbon dioxide water --- --- --- ---…
Answer this question and get it marked →The results of two tests on solid P are shown. test result 1 add aqueous gas given off that turns sodium hydroxide to solid moist red litmus paper blue 2 dissolve solid in water,…
Answer this question and get it marked →Period 3 of the Periodic Table is shown. Na Mg Al Si P S Cl Ar Which statement about these elements is correct? A All the elements are metals. B All the elements are non-metals. C…
Answer this question and get it marked →Which statement about noble gases is correct? A Helium is used to fill filament lamps. B They are all diatomic gases. C Argon and helium are found in clean air. D They are all in…
Answer this question and get it marked →Why are gold alloys, rather than pure gold, used to make jewellery? A Alloys are better electrical conductors. B Alloys are less likely to corrode. C Alloys are harder. D Alloys…
Answer this question and get it marked →Four substances are listed. 1 aqueous sodium sulfate 2 dilute sulfuric acid 3 solid iodine 4 white copper(II) sulfate Which substances turn cobalt(II) chloride from blue to pink?…
Answer this question and get it marked →The structures of four organic compounds are shown. 1 2 3 4 H H H H H H H H H H C C C H H C H H C C C H H C C O H H H H H H H H Which compounds are alkanes? A 1, 2 and 3 B 1 and 2…
Answer this question and get it marked →The diagram shows a speed–time graph for part of the journey of a car. speed 0 time Which statement about the part of the journey shown is correct? A The car travels at a constant…
Answer this question and get it marked →A vehicle is taken from the Earth to the Moon where the gravitational field strength is smaller. How do the mass and the weight of the vehicle on the Moon compare with their…
Answer this question and get it marked →Which statement about air resistance is correct? A It acts in the same direction as the direction of motion. B It always acts in the opposite direction to the force of gravity. C…
Answer this question and get it marked →The work done by a force on an object is calculated using the magnitude of the force and only one other quantity. What is this other quantity? A the acceleration of the object B…
Answer this question and get it marked →Which form of energy is not a form of potential energy? A chemical B elastic C gravitational D sound
Answer this question and get it marked →What happens as a liquid starts to evaporate? A The mass of the remaining liquid increases. B The mass of the remaining liquid is constant. C The temperature of the remaining…
Answer this question and get it marked →The metal lid on a glass jar is difficult to unscrew. The lid is unscrewed more easily after it is held under hot water. What is the reason for this? A The jar contracts more than…
Answer this question and get it marked →The word ‘LIGHT’ is printed on a piece of paper. The piece of paper is held in front of a vertical mirror with the word ‘LIGHT’ upright. A person looks at the mirror and sees an…
Answer this question and get it marked →Light passes through a parallel-sided block of glass. Which diagram shows how the light passes through the block? A B air glass air glass C D air glass air glass
Answer this question and get it marked →Which change makes the pitch of a sound higher? A decreasing the amplitude of the sound wave B decreasing the frequency of the sound wave C increasing the amplitude of the sound…
Answer this question and get it marked →The diagram shows a cell connected to a resistor and two meters, X and Y. The circuit is used when determining the resistance of the resistor. X Y What are the quantities measured…
Answer this question and get it marked →A circuit contains two lamps connected in parallel. One fuse protects both lamps and one switch operates both lamps. Which circuit diagram shows this arrangement? A B C D
Answer this question and get it marked →An electrical appliance with a resistance of 600 Ω is connected to a 240 V supply. Which fuse rating is appropriate to protect the appliance and the wires from overheating if a…
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