IGCSE Sciences - Co-Ordinated (0973) — May–June 2023, Paper 11
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →What is meant by respiration? A protein synthesis B sweating to lose heat C the function of lungs D the release of energy
Answer this question and get it marked →The diagram shows a cell with a magnification of x1000. The width of the image is 45 mm. [Diagram: a cell with its width labelled; image width = 45 mm at x1000 magnification.]…
Answer this question and get it marked →Linoleic acid is a fatty acid. Which larger molecule may contain linoleic acid? A glycogen B oil C protein D starch
Answer this question and get it marked →Which type of molecule are enzymes? A amino acids B carbohydrates C fats D proteins
Answer this question and get it marked →The diagram shows arrows representing gas exchange between a plant and the air. Carbon dioxide in the air is above the plant (arrows 1 and 2) and oxygen in the air is below the…
Answer this question and get it marked →A person has a low red blood cell count and is constipated. Which row shows the components that may be in short supply in this person's diet? A low red blood cell count: calcium;…
Answer this question and get it marked →What is the sequence of blood vessels that a red blood cell passes through as it travels from the vena cava to the kidney? A pulmonary artery - pulmonary vein - aorta - renal…
Answer this question and get it marked →In the diagram of the human breathing system, which structures are correctly labelled? [Diagram: labels point to trachea, bronchiole, bronchus and alveoli.] A alveoli and…
Answer this question and get it marked →What are the effects of adrenaline? A breathing rate: decrease; pulse rate: decrease; pupil size: widens B breathing rate: decrease; pulse rate: increase; pupil size: narrows C…
Answer this question and get it marked →In a plant, what leads to offspring that are genetically identical to the parent? A asexual reproduction B insect pollination C seed germination D sexual reproduction
Answer this question and get it marked →The diagram shows eggs and sperm containing sex chromosomes. Eggs: 1 = XX, 2 = X, 3 = XY, 4 = Y. Sperm: 5 = X, 6 = Y, 7 = XX, 8 = XY. Which row gives the correct combination of…
Answer this question and get it marked →How do herbivores get their energy? A by eating animals and plants B by eating animals only C by eating plants only D directly from sunlight
Answer this question and get it marked →The graph shows the change in atmospheric carbon dioxide levels over time, rising steadily from about 1958 to 2013. [Graph: mass of carbon dioxide / arbitrary units vs year; an…
Answer this question and get it marked →An aqueous salt solution contains an insoluble impurity. Which processes are used to obtain pure salt crystals? A distillation then crystallisation B distillation then…
Answer this question and get it marked →The element phosphorus burns in air, as shown. 4P + 5O2 - P4O10 What does the formula P4O10 show? A a mixture of atoms of two elements B a mixture of molecules of two elements C a…
Answer this question and get it marked →Which row describes an atom that has the nucleon number 24? A protons 8, neutrons 8, electrons 8 B protons 12, neutrons 12, electrons 12 C protons 21, neutrons 24, electrons 21 D…
Answer this question and get it marked →Lithium is in Group I and bromine is in Group VII of the Periodic Table. What is the formula of lithium bromide? A LiBr B LiBr2 C Li2Br D Li2Br2
Answer this question and get it marked →Which diagram shows equipment used to electroplate nickel with copper? [Diagrams A-D: power supply connected to nickel and copper electrodes in molten or aqueous copper chloride.…
Answer this question and get it marked →Which statement about exothermic and endothermic reactions is correct? A An endothermic reaction involves heat energy being taken in by the reactants. B An exothermic reaction…
Answer this question and get it marked →Which statement shows that methane, CH4, is oxidised when it burns? A The products of the reaction are gaseous. B The products of the reaction are water and carbon dioxide. C The…
Answer this question and get it marked →Magnesium chloride is prepared by reacting an excess of insoluble magnesium oxide with dilute hydrochloric acid. Which processes are used to obtain pure crystals of magnesium…
Answer this question and get it marked →The properties of some substances are listed. 1 form acidic oxides 2 have high melting points 3 act as catalysts 4 form coloured compounds What are the properties of transition…
Answer this question and get it marked →Which statement describes a chemical test for water? A Add blue cobalt(II) chloride. B Add blue copper(II) sulfate. C Measure the boiling point. D Use universal indicator.
Answer this question and get it marked →Which statement about sulfur is correct? A It is a metallic element. B It is used to make sulfuric acid. C It is in Group VII of the Periodic Table. D An atom of sulfur contains…
Answer this question and get it marked →Which statements about limestone are correct? 1 Its main constituent is calcium oxide. 2 It can be used to manufacture lime. 3 It thermally decomposes to release carbon dioxide. 4…
Answer this question and get it marked →Petroleum is separated into fractions by fractional distillation. Information about uses of some fractions and positions in the fractionating column is shown. 1 gasoline: making…
Answer this question and get it marked →Which process forms ethanol? A combustion B cracking C distillation D fermentation
Answer this question and get it marked →The graph shows how the speed of an object varies with time. The line starts at 2.0 m/s at time 0 s and increases linearly to 8.0 m/s at time 10 s. [Speed-time graph: from (0,…
Answer this question and get it marked →The weight of an object of mass m is given by the expression mg. Which row gives the units for weight and g? A weight kg, g kg/N B weight kg, g N/kg C weight N, g kg/N D weight N,…
Answer this question and get it marked →The diagrams show all the forces acting on each of four objects. [Diagrams A-D: A has 6.0+2.0 N left vs 8.0 N right, 4.0 N up vs 4.0 N down. B has 8.0 N left vs 5.0+3.0 N right,…
Answer this question and get it marked →The diagram shows a triangular sheet of metal with sides of length 50 cm, 40 cm and 30 cm. The sheet is free to move about a pivot at the top corner. A cord is attached to the…
Answer this question and get it marked →A skier starts from rest at P, accelerates down a slope and then comes to rest at Q. [Diagram: skier descending a slope from high point P to low point Q.] Which series of energy…
Answer this question and get it marked →Which term describes a gas changing into a liquid? A boiling B condensation C evaporation D melting
Answer this question and get it marked →A man stands 420 m away from a high wall. He bangs a drum once and starts a stop-watch at the same time. When he hears an echo from the wall, the stop-watch reads 2.4 s. What is…
Answer this question and get it marked →A student stands in front of a plane mirror on a wall. Which statement about the image of the student is not correct? A The image is laterally inverted (left to right). B The…
Answer this question and get it marked →Two insulators are charged by rubbing them with a cloth. After this, the charged insulators repel each other. Which statement is a possible description of how the insulators…
Answer this question and get it marked →A battery of e.m.f. V is connected across a resistor of resistance R. There is a current in the resistor. [Circuit diagram: battery V connected to resistor R, current flowing.]…
Answer this question and get it marked →Fuses are used in domestic electric circuits. Which statement about fuses is correct? A A fuse is connected in the live wire. B A fuse is connected in the neutral wire. C A 3.0 A…
Answer this question and get it marked →A straight wire carries a current into the page. [Diagrams A-D: concentric circular field lines around a wire carrying current into the page, with differing directions.] Which…
Answer this question and get it marked →A radioactive isotope has a half-life of 3.0 days. A sample contains 4000 atoms of this isotope. How many atoms of the isotope remain after 6.0 days? A 0 B 500 C 1000 D 2000
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