IGCSE Sciences - Co-Ordinated (0654) — 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 What do both animals and plants need to meet their nutritional requirements? A carbon dioxide B ions C light D organic compounds
Answer this question and get it marked →2 Oxygen produced in palisade mesophyll cells by photosynthesis diffuses into the air spaces in the leaf. What causes this movement? A osmosis between the leaf cells B evaporation…
Answer this question and get it marked →3 A student tests a sample of food to identify its composition. The results are: Benedict's test - brick-red precipitate; biuret test - blue; iodine solution - blue-black. Which…
Answer this question and get it marked →4 The diagram shows a functional human enzyme at 37 C. Which row shows the likely shape of this enzyme at 5 C and 80 C? (Options A-D show pairs of enzyme shapes.) A B C D
Answer this question and get it marked →5 What is the manufacture of carbohydrates from raw materials using light energy called? A growth B photosynthesis C respiration D reproduction
Answer this question and get it marked →6 Which row about secretions in the alimentary canal is correct? substance secreted action area of alimentary canal ----- --------------------…
Answer this question and get it marked →7 Which vessels carry blood towards the heart? (Columns: aorta; pulmonary artery; pulmonary vein; vena cava; key: tick = yes, cross = no.) A B C D
Answer this question and get it marked →8 Which process releases the most energy? A carbon dioxide + water - glucose + oxygen B glucose + oxygen - carbon dioxide + water C glucose - alcohol + carbon dioxide D glucose -…
Answer this question and get it marked →9 The arterioles that supply blood to the skin's surface capillaries undergo vasodilation. Which row describes the effect of this on the core body temperature and the volume of…
Answer this question and get it marked →10 Which statements about human egg and sperm cells are correct? 1 The egg cell's membrane changes to prevent other sperm from entering it after fertilisation. 2 The egg and sperm…
Answer this question and get it marked →11 Which row shows the sex chromosomes in humans? female male ----- -------- ------ A XX XY B XY XX C YY XX D XX YY
Answer this question and get it marked →12 The diagram shows part of a food web in a rainforest (organisms include jaguar, green anaconda, tanager bird, praying mantis, crocodile, orb spider, leaf-cutter ant, agouti,…
Answer this question and get it marked →13 The diagram shows part of the carbon cycle (carbon dioxide in the atmosphere linked by processes A, B, C, D to animals, plants, decaying matter and fossils). Which process, due…
Answer this question and get it marked →14 Which process is used to obtain water from a salt solution? A chromatography B crystallisation C distillation D filtration
Answer this question and get it marked →15 One isotope of oxygen is represented by 16 over 8 O. Which diagram represents a different isotope of oxygen? (Options A-D show nuclei with different numbers of protons (p) and…
Answer this question and get it marked →16 Which row shows the ionic half-equation for the reaction at the cathode during the electrolysis of the named electrolyte? electrolyte equation -----…
Answer this question and get it marked →17 When dilute hydrochloric acid reacts with calcium carbonate, carbon dioxide is produced. Which pieces of apparatus are used to investigate the effect of temperature on the rate…
Answer this question and get it marked →18 Solid zinc reacts with aqueous copper(II) sulfate. The ionic equation for the reaction is: Zn + Cu2+ - Zn2+ + Cu. Which row identifies the substance being oxidised and the…
Answer this question and get it marked →19 Chromium(III) oxide reacts with dilute hydrochloric acid and with aqueous sodium hydroxide. Which word describes chromium(III) oxide? A acidic B amphoteric C basic D neutral
Answer this question and get it marked →20 Gas X turns limewater milky. What is X? A carbon dioxide B chlorine C hydrogen D oxygen
Answer this question and get it marked →21 Which statements about the elements in Group VII of the Periodic Table are correct? 1 Bromine is lighter in colour than chlorine. 2 Chlorine is more reactive than bromine. 3…
Answer this question and get it marked →22 Neon is in Group VIII of the Periodic Table. Which row about neon is correct? (Columns: unreactive; diatomic; full inner electron shell; incomplete outer electron shell; key:…
Answer this question and get it marked →23 Which row identifies an ore of aluminium and the method of extraction of aluminium from its ore? ore method of extraction ----- ---------- ------------------------- A bauxite…
Answer this question and get it marked →24 Copper(II) sulfate and cobalt(II) chloride are used to test for water. Which rows show the colour changes for these two substances? 1 cobalt(II) chloride - blue - pink 2…
Answer this question and get it marked →25 Sulfuric acid is manufactured by the Contact process. Which reaction in this process uses a catalyst? A S + O2 - SO2 B 2SO2 + O2 - 2SO3 C SO3 + H2SO4 - H2S2O7 D H2S2O7 + H2O -…
Answer this question and get it marked →26 What is the main constituent of clean air and of natural gas? clean air natural gas ----- ----------- ------------- A nitrogen ethane B nitrogen methane C oxygen ethane D…
Answer this question and get it marked →27 The structure of a monomer is shown (a substituted alkene: HO-C(H)=C(CH3)-H). Which structure represents a section of the addition polymer that is formed from this monomer?…
Answer this question and get it marked →28 The speed-time graph represents the motion of a vehicle during the first 10 s of a journey (speed m/s rising linearly to 10 m/s at 10 s). How far does the vehicle travel during…
Answer this question and get it marked →29 The diagram shows a spring without a load and then with a load of mass 500 g suspended from it. The spring obeys Hooke's law. The length of the unloaded spring is 30 cm. When…
Answer this question and get it marked →30 A weightless L-shaped beam is pivoted as shown. A load of mass 2.4 kg is suspended from the beam at point X (30 cm horizontally from the pivot). The beam is held in equilibrium…
Answer this question and get it marked →31 Four different kettles contain different masses of water and are used to heat the water from room temperature to boiling point in different times. Which kettle has the lowest…
Answer this question and get it marked →32 A gas in a balloon is heated at constant pressure. What happens to the gas? A Its density decreases. B Its mass decreases. C Its temperature decreases. D Its volume decreases.
Answer this question and get it marked →33 Which diagram shows a ray of light undergoing total internal reflection? (Options A-D show an incident ray at a glass-air or air-glass boundary.) A B C D
Answer this question and get it marked →34 Which two types of wave cannot travel at the same speed as each other in a vacuum? A infrared and gamma B ultraviolet and X-rays C light and microwaves D radio waves and sound
Answer this question and get it marked →35 The electromotive force (e.m.f.) of a battery is 2.0 V. Which statement is correct? A The battery supplies 0.50 J of energy for every 1.0 C of charge driven around a circuit. B…
Answer this question and get it marked →36 The potential difference (p.d.) across a 60 ohm resistor is 12 V. How much time does it take for a charge of 100 C to pass through the resistor? A 0.0020 s B 0.050 s C 20 s D…
Answer this question and get it marked →37 A heater circuit is protected by a 10 A fuse. How does the fuse protect the circuit? A It cuts off the current when the current in the heater is greater than 10 A. B It…
Answer this question and get it marked →38 The diagram shows a wire carrying an electric current towards the bottom of the page. The wire is at right angles to a magnetic field directed into the page. A force acts on…
Answer this question and get it marked →39 Which voltage-time graph shows the output voltage of a simple a.c. generator? (Options A-D show voltage against time.) A B C D
Answer this question and get it marked →40 A beam of different types of ionising radiation passes through an electric field between two metal plates (positive plate on top, negative plate below). The diagram shows the…
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