IGCSE Sciences - Co-Ordinated (0973) — May–June 2025, Paper 11
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Which characteristic of living organisms involves a permanent increase in size? A excretion B growth C respiration D sensitivity
Answer this question and get it marked →The photograph shows a caterpillar. The length of line PQ is 90 mm. The actual length of the caterpillar is 30 mm. What is the magnification of the photograph? A ×0.33 B ×3.0 C…
Answer this question and get it marked →What is the name of the process where water passes into and out of cells through a partially permeable membrane? A diffusion B evaporation C osmosis D transpiration
Answer this question and get it marked →Which molecules make up fats and oils? A amino acids and glycerol B fatty acids and glycerol C glucose and amino acids D glucose and fatty acids
Answer this question and get it marked →Which type of molecules are enzymes? A carbohydrates B fats C hormones D proteins
Answer this question and get it marked →The starch in a plant is removed. One part of a leaf of the plant is covered with black card. The plant is then put in the light for six hours. The card is removed and the leaf is…
Answer this question and get it marked →The diagram shows the human alimentary canal and other organs. Six structures are labelled 1 to 6: label 1 points to the oesophagus, label 2 to the stomach, label 3 to a region of…
Answer this question and get it marked →The diagram shows a cross-section of a plant stem. A ring of tissue near the outer edge of the stem is labelled X. Which tissue is X? A cortex B mesophyll C phloem D xylem
Answer this question and get it marked →Veins contain valves along their length. What is the function of these valves? A to allow gas exchange B to carry blood under high pressure C to ensure one-way flow of blood D to…
Answer this question and get it marked →The diagram shows the human gas exchange system. Four structures are labelled A, B, C and D: A points to the right lung tissue, B to the rib region on the right side, C to the…
Answer this question and get it marked →Which row shows effects of adrenaline? heart rate pupil diameter --- --- --- A increases increases B increases no effect C decreases increases D no effect increases
Answer this question and get it marked →Which graph represents variation in the height of humans? Each graph plots number of individuals (y-axis) against height (x-axis). Graph A shows a smooth bell-shaped (normal)…
Answer this question and get it marked →A food chain is shown. tree → insect → mouse → owl Which statement about this food chain is correct? A The insect is a carnivore. B The mouse is a herbivore. C The owl is a…
Answer this question and get it marked →Which change of state results in the greatest increase in the separation of particles? A gas to liquid B liquid to gas C liquid to solid D solid to liquid
Answer this question and get it marked →An atom of phosphorus has a nucleon number of 31 and a proton number of 15. How many neutrons are there in this atom? A 15 B 16 C 31 D 46
Answer this question and get it marked →The diagram shows the positions of some elements in the Periodic Table. Four positions are marked A, B, C and D on an outline of the table: A is in Group II, Period 2; B is in…
Answer this question and get it marked →What happens to a tellurium atom when it forms a tellurium ion, Te²⁻? A It gains two electrons. B It gains two protons. C It loses two electrons. D It loses two protons.
Answer this question and get it marked →In which molecule are all the outer-shell electrons of the atoms used to form the covalent bonds? A HCl B H₂O C NH₃ D CH₄
Answer this question and get it marked →Molten lead(II) bromide is electrolysed using inert electrodes. Which row describes the products of this electrolysis? a grey metal forms at the positive electrode a red-brown gas…
Answer this question and get it marked →Equal masses of four substances are added separately to different samples of 10 cm³ of dilute hydrochloric acid at 22 °C. The final temperature of each reaction mixture is…
Answer this question and get it marked →Solid zinc carbonate reacts with excess dilute hydrochloric acid. Which changes in the conditions increase the rate of this reaction? 1 Increase the concentration of hydrochloric…
Answer this question and get it marked →Which equation shows the oxidation of a metal? A CuO + H₂ → Cu + H₂O B CuO + Zn → Cu + ZnO C Fe₂O₃ + 3CO → 2Fe + 3CO₂ D 2ZnO + C → 2Zn + CO₂
Answer this question and get it marked →Four liquids are tested with universal indicator and with anhydrous copper(II) sulfate. Which row shows the observations for pure water? universal indicator anhydrous copper(II)…
Answer this question and get it marked →Which compound is an alkene? Four displayed (structural) formulae are shown. A shows ethane, with two carbon atoms joined by a single C–C bond and each carbon bonded to hydrogen…
Answer this question and get it marked →Which statement describes poly(ethene)? A It is formed from monomer molecules which each contain two atoms. B It is formed from a saturated hydrocarbon monomer. C It is formed in…
Answer this question and get it marked →Naphtha is obtained from petroleum. What is a use for naphtha? A cooking B heating C making roads D making chemicals
Answer this question and get it marked →Aqueous ammonia is separately added dropwise and then in excess to four different aqueous cations. Which cations give a precipitate that then dissolves? 1 Ca²⁺ 2 Cu²⁺ 3 Fe²⁺ 4…
Answer this question and get it marked →The total thickness of 500 sheets of paper is 4.5 cm. What is the thickness of 1 sheet of paper in mm? A 0.0090 mm B 0.090 mm C 0.90 mm D 9.0 mm
Answer this question and get it marked →A metal bar has weight 50 N and length 2.0 m. The centre of gravity of the bar is 0.80 m from the left-hand end. The bar is placed on a pivot at a point 0.40 m from the left-hand…
Answer this question and get it marked →The diagram shows a large force of magnitude P and a small force of magnitude Q acting on a box. Force P acts to the left and the smaller force Q acts to the right, in opposite…
Answer this question and get it marked →Which statement about the transfer of thermal energy is correct? A Thermal energy transfer by radiation involves mainly ultraviolet radiation. B Thermal energy transfer by…
Answer this question and get it marked →Which pair consists of one good thermal conductor and one bad thermal conductor? A aluminium and wood B brass and copper C glass and plastic D iron and steel
Answer this question and get it marked →What is the name of the distance between one wave crest and the next wave crest? A amplitude B frequency C speed D wavelength
Answer this question and get it marked →The diagram shows two rays of light passing through a thin converging lens to form an image of an object. Four distances are labelled. Distance A is from the object to the lens…
Answer this question and get it marked →The diagram shows light hitting a plane mirror. An incident ray strikes the mirror, a normal is drawn at the point of incidence, and the reflected ray leaves the mirror. The angle…
Answer this question and get it marked →In which circuit can the brightness of the lamp be varied continuously? Four circuit diagrams are shown, each containing a cell and a lamp. Circuit A contains a fixed resistor in…
Answer this question and get it marked →A 12 Ω resistor is connected in parallel with a 17 Ω resistor. Which statement about the combined resistance of the two resistors is correct? A It must be equal to 29 Ω. B It must…
Answer this question and get it marked →The voltage across an electric heater is 240 V and the current in the heater is 3.0 A. The heater is connected in a circuit with a fuse. Which fuse rating is the most suitable? A…
Answer this question and get it marked →A teacher handles a radioactive source with tongs that are 10 cm long. Using the tongs protects the teacher from one type of ionising radiation. Which type of radiation from the…
Answer this question and get it marked →What is between the orbits of Mars and Jupiter? A the asteroid belt B the orbit of Saturn C the orbit of the Earth D the orbit of Venus
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