IGCSE Science - Combined (0653) — October–November 2024, Paper 22
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →A car is filled with fuel and is driven away. Which characteristic of living organisms is not matched by a similar process in the car? A excretion B growth C movement D respiration
Answer this question and get it marked →Which row shows the site of chemical reactions in a cell and identifies the partially permeable structure in a cell? site of chemical reactions partially permeable structure ---…
Answer this question and get it marked →Uncooked potato pieces of identical size and mass are placed in different sugar solutions for two hours. Which sugar solutions cause a decrease in the mass of a potato piece? 1 a…
Answer this question and get it marked →The graph shows the effect of temperature on the activity of an enzyme. Enzyme activity (in arbitrary units, 0 to 6) is plotted against temperature (0 to 40 °C). The curve rises…
Answer this question and get it marked →Which substances produced by plants contain either magnesium ions or nitrogen atoms? The table uses a tick (✓) or cross (✗) for chlorophyll, enzymes and starch. chlorophyll…
Answer this question and get it marked →The table shows two plant tissues with their possible functions (support and transport), using a tick (✓) or cross (✗). tissue support transport --- --- --- --- 1 phloem ✓ ✓ 2…
Answer this question and get it marked →What is not a possible risk factor for coronary heart disease? A genetic predisposition B healthy diet C smoking D stress
Answer this question and get it marked →What is the sequence of structures that air passes through when entering the body? A larynx → trachea → bronchi → bronchioles B larynx → trachea → bronchioles → bronchi C trachea…
Answer this question and get it marked →The chemical equation for aerobic respiration is shown with the numbers replaced by the letters P, Q and R. CPHQOP + POR → PCOR + PHRO Which row shows the correct values for P, Q…
Answer this question and get it marked →Which row shows the changes in pulse rate and pupil width that occur when a person is frightened? pulse rate pupil width --- --- --- A decreases decreases B decreases increases C…
Answer this question and get it marked →Which statement about auxin is correct? A It causes cell division. B It is equally distributed in response to gravity. C It is made in the leaves. D It is unequally distributed in…
Answer this question and get it marked →During pregnancy in humans, gas exchange occurs between a mother and her fetus. Where does this gas exchange occur? A amniotic fluid B amniotic sac C placenta D umbilical cord
Answer this question and get it marked →Which animal gets its energy from eating other animals only? A carnivore B decomposer C herbivore D producer
Answer this question and get it marked →Which process produces a chemical change? A adding ethanol to water B adding sodium to water C boiling water D melting ice
Answer this question and get it marked →Which row describes an element and a compound? element compound --- --- --- A contains more than one type of atom contains elements chemically combined B contains more than one…
Answer this question and get it marked →Potassium chloride, KCl, is a solid at room temperature. Ammonia, NH3, is a gas at room temperature. Which statement explains this difference? A Ionic bonds are stronger than…
Answer this question and get it marked →Titanium oxide contains Ti⁴⁺ ions and O²⁻ ions. What is the formula of titanium oxide? A TiO B TiO2 C Ti2O D Ti4O2
Answer this question and get it marked →Which statement about changes at the electrodes during electrolysis is correct? A Anions gain electrons at the positive electrode. B Anions lose electrons at the negative…
Answer this question and get it marked →The equation representing the formation of a chlorine molecule from two chlorine atoms is shown. 2Cl(g) → Cl2(g) Which statement about this process is correct? A The chlorine…
Answer this question and get it marked →The rate of a reaction increases when the temperature or the concentration of the reactants is increased. Which row explains why the rate of reaction increases? change activation…
Answer this question and get it marked →Magnesium chloride is a soluble salt which is made when excess magnesium reacts with dilute hydrochloric acid. Four separation techniques are listed. 1 chromatography 2…
Answer this question and get it marked →What is used to show that a compound contains potassium? A a flame test B aqueous ammonia C aqueous silver nitrate D aqueous sodium hydroxide
Answer this question and get it marked →Sodium has a melting point of 98 °C and a density of 0.97 g / cm³. Which row shows the melting point and density of rubidium? melting point / °C density / g / cm³ --- --- --- A 39…
Answer this question and get it marked →Which group of the Periodic Table contains monoatomic gaseous elements? A Group I B Group II C Group VII D Group VIII
Answer this question and get it marked →W, X, Y and Z are metals. The metals are added to separate aqueous metal ion solutions. Some of the results are shown. W + Z²⁺ → Z + W²⁺ X + Z²⁺ → no reaction Y + Z²⁺ → Z + Y²⁺ Y…
Answer this question and get it marked →Which metal can be extracted from its ore using hydrogen? A calcium B sodium C copper D zinc
Answer this question and get it marked →An experiment is set up to show the effect of air and water on iron. The diagram shows tube X containing iron wire over water in air, and tube Y containing iron wire coated with…
Answer this question and get it marked →A car is travelling along a straight road. The speed–time graph for part of its journey is shown. From X the speed increases up to Y, then from Y to Z the speed stays constant (a…
Answer this question and get it marked →The extension–load graph for a wire is shown. Extension is plotted against load. The graph is a straight line up to a point and then curves; points A and B are on the lower…
Answer this question and get it marked →A flat door on the top of a submarine has an area of 1.2 m². The diagram shows the door of area 1.2 m² on top of the submarine. The pressure of the water above the door of the…
Answer this question and get it marked →A force F acts on an object as it moves a distance d across a smooth surface. The energy of the object changes by E. Which equation gives the work done W on the object by the…
Answer this question and get it marked →Three beakers contain samples of the same substance. The diagrams indicate the molecular structures of the substance in each of the beakers (showing different arrangements of…
Answer this question and get it marked →A room is heated by a heater on a wall. Which statement describes what happens to the heated air just above the heater? A The heated air becomes denser and falls. B The heated air…
Answer this question and get it marked →Bread is toasted under a hot grill. The diagram shows a grill above a slice of bread. What is the main part of the electromagnetic spectrum involved in transferring thermal energy…
Answer this question and get it marked →A sound wave is travelling at a speed of 300 m / s in air. The sound wave has a frequency of 7.5 kHz. What is the wavelength of the sound wave? A 4.0 cm B 25 cm C 4.0 m D 25 m
Answer this question and get it marked →A ray of light is incident on a plane mirror at an angle of incidence of 20°. What is the angle between the incident ray and the reflected ray? A 10° B 20° C 40° D 70°
Answer this question and get it marked →A thin converging lens is used as a magnifying glass to view an object. Where is the object placed? A further than two focal lengths from the lens B at exactly two focal lengths…
Answer this question and get it marked →A potential difference (p.d.) of 10 V across a resistor produces a current of 2.0 A in the resistor. What is the resistance of the resistor? A 0.050 Ω B 0.20 Ω C 5.0 Ω D 20 Ω
Answer this question and get it marked →Four wires are made of the same material. They have different lengths and different cross-sectional areas. Which wire has the smallest resistance? length cross-sectional area ---…
Answer this question and get it marked →The diagram shows a circuit containing a 12 V battery, four identical resistors, an ammeter (A) and a voltmeter (V). Two values of current of 3.0 A are shown in two parallel…
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