IGCSE Sciences - Co-Ordinated (0654) — 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 →Auxin is a chemical that is produced in shoot tips. With which characteristics of living things is auxin involved (choosing among growth, movement, sensitivity)? A growth,…
Answer this question and get it marked →Which statement about the named cells is correct? A Palisade mesophyll cells have many chloroplasts. B Red blood cells have a haploid nucleus. C Root hair cells have many…
Answer this question and get it marked →Which large molecule is made from many smaller glucose molecules? A amino acid B glycerol C glycogen D protein
Answer this question and get it marked →Some bacteria live in acidic, hot springs. What are the optimum conditions for the enzymes of these bacteria? A 20 degrees C and pH 4 B 20 degrees C and pH 9 C 80 degrees C and pH…
Answer this question and get it marked →Which statement about the process of photosynthesis is correct? A Chlorophyll produces chemical energy for the synthesis of carbohydrates. B Chlorophyll produces light energy for…
Answer this question and get it marked →Protein shakes are used by athletes to supplement their diet. They are a drink made by dissolving protein powders in water or milk. Which types of digestion will be required…
Answer this question and get it marked →Which component of blood is matched to its function (component / function)? A plasma / clot blood B platelets / transport oxygen C red blood cells / transport hormones D white…
Answer this question and get it marked →Changes in the body occur as a result of increased physical activity: increased physical activity - increased respiration in cells - effect R - effect S. What are effects R and S…
Answer this question and get it marked →A plant was placed horizontally in complete darkness. The diagram shows how the plant had grown after one week (the shoot has bent upwards). Which response has the shoot made? A…
Answer this question and get it marked →What processes occur in the oviduct? A fertilisation and then the zygote undergoes meiosis B fertilisation and then the zygote undergoes mitosis C zygote undergoes meiosis and…
Answer this question and get it marked →The pedigree diagram shows the inheritance of a recessive condition, with individuals P, Q and R. Which statements are correct with reference to this condition? 1 P and Q are both…
Answer this question and get it marked →What is a description of a trophic level? A the ability of an organism to make its own food through photosynthesis B the death of organisms due to increased availability of…
Answer this question and get it marked →Which graph represents a pollution incident in a lake causing eutrophication (graphs of concentration of nitrogen, decomposers and oxygen against time)? A graph A B graph B…
Answer this question and get it marked →The bonding in potassium iodide is ionic. Which row describes the potassium iodide lattice structure (positive ions / negative ions / attractive force between ions)? A iodide /…
Answer this question and get it marked →What is the definition of the relative atomic mass, Ar, of an element? A the average mass of atoms of the element on a scale in which an atom of carbon-12 has a mass of exactly 12…
Answer this question and get it marked →Which statements about the electrolysis of aqueous copper(II) sulfate are correct? 1 Oxygen is produced at the anode when carbon electrodes are used. 2 Copper is produced at the…
Answer this question and get it marked →What describes an endothermic reaction? A a reaction in which all the bonds in all the reactants are broken B a reaction in which energy is released to the surroundings C a…
Answer this question and get it marked →The rate of a reaction that produces carbon dioxide gas is investigated. Which piece of apparatus gives the least accurate measurement for the gas production? A burette B gas…
Answer this question and get it marked →What happens when an acid reacts with an alkali? A Neutralisation takes place and the temperature falls. B Neutralisation takes place and the temperature rises. C Reduction takes…
Answer this question and get it marked →A student tests an aqueous solution for the presence of sulfate ions. What is the test and observation for sulfate ions? A Acidify the solution and add aqueous barium ions to…
Answer this question and get it marked →Elements in Group VI share similar chemical and physical trends as elements in Group VII. Which statement about the elements of Group VI is correct? A Atoms of Group VI elements…
Answer this question and get it marked →The reactions of four different metals W, X, Y and Z with aqueous solutions of their ions are listed: W reacts with aqueous ions of X and of Z but not with aqueous ions of Y; X…
Answer this question and get it marked →A sample of air is analysed before and after it is used in an experiment. The percentage composition (nitrogen / oxygen / carbon dioxide / other gases): before 78 / 21 / 0.04 /…
Answer this question and get it marked →What is the catalyst used in the Contact process? A yeast B iron C nickel D vanadium(V) oxide
Answer this question and get it marked →What is the word equation for the manufacture of lime? A calcium carbonate - calcium hydroxide + carbon dioxide B calcium carbonate - calcium oxide + carbon dioxide C calcium…
Answer this question and get it marked →Petroleum is separated into useful fractions by fractional distillation. Which row shows the uses of the named fractions (gasoline / naphtha / bitumen)? A fuel for cars /…
Answer this question and get it marked →Which substance decolourises aqueous bromine (showing four organic structures)? A ethane (CH3-CH3) B methane (CH4) C ethene (CH2=CH2) D ethanol (CH3-CH2-OH)
Answer this question and get it marked →The weight of a man on the Earth is 600 N, where the gravitational field strength is 10 N / kg. The gravitational field strength on the Moon is 1.6 N / kg. What is the weight of…
Answer this question and get it marked →A uniform beam of length 20 cm is balanced on a pivot at its centre. A 20 N load is placed at one end of the beam and a 30 N load is placed at the other end. A 25 N load is also…
Answer this question and get it marked →A rope is used to pull a block of mass 25 kg up a slope from point X to point Y. The slope has a length of 5.0 m, a horizontal base of 4.0 m and a vertical height of 3.0 m. The…
Answer this question and get it marked →A liquid starts to evaporate. Which molecules escape and what happens to the temperature of the remaining liquid (molecules that escape / temperature of remaining liquid)? A…
Answer this question and get it marked →Water in a metal pan is heated on a gas burner. What are the main methods by which heat is transferred through the metal pan to the water and throughout the water? A conduction…
Answer this question and get it marked →The critical angle of water is 49 degrees. A ray of light from the bottom of a swimming pool has an angle of incidence of 50 degrees at the surface of the water. What happens to…
Answer this question and get it marked →Humans can hear sounds with a range of frequencies. Which row shows the smallest frequency and the greatest frequency that can be heard by a healthy human ear (smallest frequency…
Answer this question and get it marked →A plastic rod is rubbed with a cloth. The rod becomes positively charged. What happens to the rod and what happens to the cloth (rod / cloth)? A electrons are removed / electrons…
Answer this question and get it marked →The circuit shown contains a battery, two resistors, a voltmeter and an ammeter. One of the resistors has a resistance of 2.0 ohms. The ammeter reading is 4.0 A and the voltmeter…
Answer this question and get it marked →A heating element in an electric kettle has a resistance of 24 ohms. When the kettle is connected to a 240 V supply, it takes 2.5 minutes to boil some water. How much energy is…
Answer this question and get it marked →A student connects the circuit shown, which contains a fuse. When the switch is closed, the fuse blows and stops the current. What is a possible reason for this? A The current…
Answer this question and get it marked →Electrical energy from a power station is transmitted over a large distance. A 100% efficient transformer is used near to the power station to reduce the energy wasted thermally…
Answer this question and get it marked →The diagram shows a radioactive source emitting three types of ionising radiation, X, Y and Z. The radiation passes through an electric field between two metal plates (top plate…
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