IGCSE Science - Combined (0653) — May–June 2023, Paper 22
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 activity of an enzyme-catalysed reaction is altered by changes in temperature. What occurs when the temperature rises above the temperature at which the enzyme works best? A…
Answer this question and get it marked →In plants, photosynthesis takes place in the leaf. During photosynthesis, ......P...... transfers ......Q...... energy into ......R...... energy. This is used for the synthesis of…
Answer this question and get it marked →What can be caused by a diet containing too little vitamin C? A anaemia B coronary heart disease C rickets D scurvy
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 →The table shows two processes that are involved in transpiration. What happens to the rate of these processes in high humidity? diffusion of evaporation of water vapour water from…
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 →In respiration, glucose is broken down to release energy. Which row states how humans could use this energy? growth keep a constant body temperature muscle contraction protein…
Answer this question and get it marked →What happens when adrenaline is released into the blood? blood glucose pulse rate concentration A increases increases B increases decreases C decreases increases D decreases…
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 part of a food web. snake jaguar macaw monkey frog fruit bat tapir water weevil banana fruit water weed Which row gives the number of each type of consumer?…
Answer this question and get it marked →Eutrophication of fresh water occurs because of a series of events in the water. The list describes these events. 1 increased aerobic respiration by decomposers 2 increased…
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 →Aqueous lead(II) nitrate, Pb(NO3)2, reacts with aqueous potassium iodide to make a precipitate of lead(II) iodide. What is the ionic equation for this reaction? A Pb+ + I– → PbI B…
Answer this question and get it marked →Which statement about the electrolysis of ionic substances is correct? A Negatively charged ions move to the cathode. B At the anode, ions lose electrons. C The anions gain…
Answer this question and get it marked →The energy level diagram for dissolving solid ammonium nitrate in water is shown. products energy reactants progress of reaction Which statement about this process is correct? A…
Answer this question and get it marked →Reducing agents are ......1...... in a reaction. Reducing agents cause the other substance in the reaction to ......2...... oxygen. Which words complete gaps 1 and 2? 1 2 A…
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 →Which electronic structure is that of a metal? A 2,8,3 B 2,8,4 C 2,8,6 D 2,8,7
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 →What is an effect of increasing the amount of carbon dioxide in the atmosphere? A increased acid rain B increased climate change C increased damage to buildings D increased health…
Answer this question and get it marked →Which statements about the members of an homologous series are correct? 1 They have similar chemical properties. 2 They have the same boiling points. 3 They have the same general…
Answer this question and get it marked →Which equation represents cracking? A C6H14 → 2C3H6 + H2 B C3H8 + 5O2 → 3CO2 + 4H2O C nCH2=CH2 → poly(ethene) D CH2=CH2 + Br2 → CH2BrCH2Br
Answer this question and get it marked →Which speed–time graph represents the motion of an object that travels a distance of 24 m? A B speed 4.0 speed m/s m / s 3.0 0 0 0 6.0 0 8.0 time / s time / s C D 4.0 speed speed…
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 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 →A rock of mass 2000 kg has a kinetic energy of 64 000 J. What is the speed of the rock? A 5.7 m / s B 8.0 m / s C 32 m / s D 64 m / s
Answer this question and get it marked →A circuit contains two lamps and four ammeters. The readings on the ammeters are I1, I2, I3 and I4, as shown. reading = I1 A A reading = I4 reading = I2 A A reading = I3 Which…
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 temperature of air next to a heater increases. This causes a convection current. Which row describes what happens to the density of the air next to the heater and states the…
Answer this question and get it marked →The diagram represents a sound wave travelling in air. wave direction 1 2 3 4 5 6 Which numbered points are at the centre of a compression and which numbered points are at the…
Answer this question and get it marked →The diagram shows the change in direction of light as it moves from medium 1 into medium 2. medium 1 medium 2 Why does this change of direction happen? A Light is a longitudinal…
Answer this question and get it marked →A student uses a thin converging lens as a magnifying glass to view an object. Where is the object placed? A as far away as possible from the lens B at a distance from the lens…
Answer this question and get it marked →A battery is connected to two identical lamps X and Y in parallel. 0.50 A X Y The current in the battery is 0.50 A. How much charge flows through lamp Y in 10 s? A 0.025 C B 0.050…
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 →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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