IGCSE Science - Combined (0653) — May–June 2024, Paper 23
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →......1...... is the ability to detect and respond to changes in the environment. Which word completes gap 1? A Excretion B Movement C Sensitivity D Reproduction
Answer this question and get it marked →The diagram shows a ciliated cell. cilia Which row shows where ciliated cells are found in the human gas exchange system and their correct function? location of ciliated cells…
Answer this question and get it marked →A plant cell was placed in a solution with a lower water potential than the cell. Which diagram represents the movement of water during the process of osmosis? A B key = less…
Answer this question and get it marked →Which small molecules are used to make proteins? A amino acids B fatty acids C glucose D glycerol
Answer this question and get it marked →Which substances are used and produced during photosynthesis? substances used substances produced A carbon dioxide and glucose oxygen and water B carbon dioxide and water glucose…
Answer this question and get it marked →Which process is defined as the taking of substances, for example food and drink, into the body through the mouth? A absorption B digestion C egestion D ingestion
Answer this question and get it marked →Which changes will increase transpiration rate? humidity temperature A decrease decrease B decrease increase C increase decrease D increase increase
Answer this question and get it marked →A diagram of the human heart is shown. valves valves muscle Which row describes the function of the valves and the action of the muscles when blood is pumped out of the heart?…
Answer this question and get it marked →Why do cells respire? A to produce oxygen B to produce water C to release energy D to use glucose
Answer this question and get it marked →A light shines onto a shoot from one side. Which row explains why the shoot bends towards the light? more auxin on the more cell elongation side of the shoot on the side of the…
Answer this question and get it marked →Which combination of features describes pollen grains from a wind-pollinated flower? A large and spiky B small and light C spiky and sticky D sticky and smooth
Answer this question and get it marked →Which type of blood cell is affected by the human immunodeficiency virus (HIV) and which effect does the virus have on those cells? type of blood cell effect on the blood cell A…
Answer this question and get it marked →Some effects that may happen in an ecosystem are listed. 1 decrease in atmospheric carbon dioxide 2 increase in atmospheric carbon dioxide 3 build up of soil 4 loss of soil Which…
Answer this question and get it marked →Which term describes ammonia, NH3? A atom B molecule C element D ion
Answer this question and get it marked →A mixture of salt water and sand is filtered. Which statement is correct? A The salt and the sand are trapped by the filter paper. B The salt is dissolved in the water and passes…
Answer this question and get it marked →Copper sulfate crystals dissolve in water. Which word describes the role of the water? A filtrate B solute C solution D solvent
Answer this question and get it marked →Which statement about covalent compounds is correct? A They are formed between a metal and a non-metal. B They are formed when atoms gain or lose electrons. C They are formed when…
Answer this question and get it marked →Magnesium reacts with dilute hydrochloric acid forming magnesium chloride and hydrogen. Which equation is correct for this reaction? A Mg + 2HCl MgCl + H2 B Mg + 2HCl MgCl 2 +…
Answer this question and get it marked →Concentrated aqueous sodium chloride is electrolysed using platinum electrodes. Which statements are correct? 1 The equation for the reaction at the cathode is Na+(aq) + e– …
Answer this question and get it marked →The energy level diagram for an endothermic reaction is shown. energy progress of reaction Which statement about this reaction is correct? A The activation energy is the minimum…
Answer this question and get it marked →Magnesium is reacted with dilute hydrochloric acid. The volume of gas produced is measured for 6 minutes. The graph obtained from the results is shown. 7 6 5 volume of 4 gas / cm3…
Answer this question and get it marked →Magnesium sulfate is a soluble salt which is prepared by reacting magnesium with dilute sulfuric acid. Which row shows the first two steps in the preparation of pure magnesium…
Answer this question and get it marked →What is the test for nitrate ions? A add aqueous sodium hydroxide, then aluminum foil, and warm, test any gas formed with damp red litmus paper B acidify, then add aqueous barium…
Answer this question and get it marked →Which equation represents a displacement reaction of the elements in Group VII of the Periodic Table? A Br2 + 2NaCl 2NaBr + Cl 2 B Cl 2 + 2NaI 2NaCl + I2 C I2 + 2NaCl 2NaI +…
Answer this question and get it marked →Which statement about the reactivity of metals is correct? A Sodium is very reactive because its atoms attract electrons very strongly. B Aluminium is more reactive than magnesium…
Answer this question and get it marked →Which substance reduces iron(III) oxide in the blast furnace? A carbon dioxide B carbon monoxide C limestone (calcium carbonate) D oxygen
Answer this question and get it marked →Which statements describe the molecules within a single fraction obtained from petroleum? 1 They are unsaturated hydrocarbons. 2 They have very different numbers of carbon atoms.…
Answer this question and get it marked →The distance–time graph is for a student walking across a park. 50 distance / m 40 30 20 10 0 0 5 10 15 20 time / s What is the student’s average speed walking across the park? A…
Answer this question and get it marked →The gravitational field strength is 10 N / kg. What is the mass of an object that has a weight of 5.0 N? A 0.50 kg B 2.0 kg C 5.0 kg D 50 kg
Answer this question and get it marked →A wire is stretched by a force. A force–extension graph is produced. What is the significance of the extension at the limit of proportionality on the graph? A It is the maximum…
Answer this question and get it marked →A worker exerts a horizontal force on a trolley. The trolley moves in a straight line along a horizontal surface. The worker pushes the trolley forwards for 5.0 m and then pulls…
Answer this question and get it marked →A stone of mass 0.30 kg is thrown upwards with an initial speed of 12 m / s. The speed of the stone decreases as the stone rises. By how much does the kinetic energy decrease when…
Answer this question and get it marked →Which statement describes one way in which solids conduct thermal energy? A Electrons are tightly packed so that vibrations pass from one electron to the next. B Molecules are…
Answer this question and get it marked →The diagram shows two identical thermometers, initially at the same temperature, placed in bright sunshine. The bulb of thermometer P is painted black. The bulb of thermometer Q…
Answer this question and get it marked →A converging lens is used as a magnifying glass. Where is the image formed and what is the nature of the image? position of image nature A on the opposite side of the lens from…
Answer this question and get it marked →A telescope in the vacuum of space has an infrared detector, an ultraviolet detector and a visible light detector. An explosion on the surface of the Sun emits infrared,…
Answer this question and get it marked →Two sounds with equal frequencies are produced by a loudspeaker. The first sound has a large amplitude. The second sound has a smaller amplitude. How do the two sounds compare? A…
Answer this question and get it marked →A series circuit consists of a variable resistor and a power supply that supplies a variable electromotive force (e.m.f.). Both the resistance of the variable resistor and the…
Answer this question and get it marked →A car has two lamps connected in parallel to a 12 V battery. Each lamp has a resistance of 2.5 . What is the total current in the circuit when the lamps are switched on? A 2.4 A…
Answer this question and get it marked →What is the relationship between energy E transferred in a component, current I through it, potential difference (p.d.) V across it, and time t ? It Vt A E= B E = IVt C E = VI D…
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