IGCSE Sciences - Co-Ordinated (0973) — May–June 2023, Paper 22
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Which is not a characteristic of all living organisms? A excretion B growth C photosynthesis D sensitivity
Answer this question and get it marked →The diagram shows a specialised cell from a plant, with structures labelled Z, Y, X and W. [Diagram: specialised plant cell with labels W, X, Y, Z.] Which structures not found in…
Answer this question and get it marked →Which row shows the elements and the small molecules that are used to make the larger molecules? A elements: carbon, hydrogen and oxygen; small molecule: glucose; larger molecule:…
Answer this question and get it marked →Which type of molecules speed up chemical digestion? A carbohydrates B enzymes C hormones D fatty acids
Answer this question and get it marked →The graph shows the effect of increasing light intensity on the rate of photosynthesis of a submerged aquatic plant. Point X is on the steeply rising part of the curve. [Graph:…
Answer this question and get it marked →What is one of the functions of bile? A denaturing lipase B digesting fats C emulsifying fats D increasing acidity
Answer this question and get it marked →The diagram shows the circulatory system of a mammal, with the lungs at the top and the rest of the body at the bottom. Blood vessels X and Y and heart chamber Z are labelled.…
Answer this question and get it marked →During cold weather, warm blooded animals, such as mammals and birds, require more food. Which statement explains the reason for this? A energy required to maintain constant body…
Answer this question and get it marked →The diagram shows an experiment using the shoots of seedlings. A control shoot bends towards the light after five days, while a shoot with a lightproof cover over its tip grows…
Answer this question and get it marked →The diagram shows a section through a flower with structures labelled S, R, Q and P. [Diagram: section through a flower; S = anther region, R = filament, P = ovary, Q = lower…
Answer this question and get it marked →Which process results in the development of strains of antibiotic-resistant bacteria? A artificial selection B discontinuous variation C natural selection D selective breeding
Answer this question and get it marked →The diagram shows a food web including phytoplankton, zooplankton, shellfish, jellyfish, fish, turtles and seabirds. [Marine food web diagram with feeding arrows.] Which groups of…
Answer this question and get it marked →The flow diagram shows the consequence of the overuse of fertilisers on farm land. leaching of fertiliser - fast growth of algae - death of algae - fast growth of X - death of…
Answer this question and get it marked →Hexane and octane are liquid hydrocarbons that mix together. [Diagrams A-D: separation apparatus; D shows fractional distillation with a fractionating column and heat.] Which…
Answer this question and get it marked →When solid zinc carbonate is heated, a different solid and a gas are formed. Which type of change occurs? A chemical B exothermic C physical D separation
Answer this question and get it marked →An atom of osmium is represented by 190/76 Os (nucleon number 190, proton number 76). How many neutrons are in this atom? A 76 B 114 C 190 D 266
Answer this question and get it marked →Aqueous potassium bromide reacts with aqueous silver nitrate to produce a cream precipitate. What is the ionic equation for this reaction? A Ag+(aq) + Br-(aq) - AgBr(s) B Ag2+(aq)…
Answer this question and get it marked →Which statement about the extraction of aluminium from its ore by electrolysis is correct? A Aluminium gains electrons from the anode. B Aluminium ions are oxidised at the…
Answer this question and get it marked →Which statement explains why increasing the concentration of reactants increases the rate of a reaction? A The proportion of particles that possess the activation energy is…
Answer this question and get it marked →Copper(II) sulfate is produced by reacting copper(II) oxide with dilute sulfuric acid. The stages in the process to produce pure dry crystals are listed. 1 Leave to crystallise in…
Answer this question and get it marked →The box lists four substances: Br2, CO, Cu, Na. Which substance is an element that forms a basic oxide and coloured compounds? A Br2 B CO C Cu D Na
Answer this question and get it marked →Car engines produce pollutant gases. Which gases are removed by catalytic converters? A carbon monoxide, nitrogen monoxide and sulfur dioxide B carbon monoxide and nitrogen…
Answer this question and get it marked →In the blast furnace, which substance is added to make slag? A calcium carbonate B carbon dioxide C carbon monoxide D coke
Answer this question and get it marked →Which catalyst is used in the Contact process? A iron B phosphoric(V) acid C nickel D vanadium(V) oxide
Answer this question and get it marked →Which statements about limestone are correct? 1 It contains calcium oxide. 2 It is used to manufacture lime. 3 It neutralises acidic industrial waste products. 4 It neutralises…
Answer this question and get it marked →Naphtha is obtained by the fractional distillation of petroleum. Which statements about naphtha are correct? 1 It burns to form carbon dioxide and water. 2 It is a mixture of…
Answer this question and get it marked →The structure of an addition polymer is shown: a repeat unit with H and CH3 groups on adjacent carbons, repeated n times (poly(propene)). [Structure: -CH(H)CH(CH3)- repeat unit;…
Answer this question and get it marked →The diagram shows the speed-time graph for an object moving in a straight line. The speed increases (with the gradient steepening) and then becomes constant. [Speed-time graph:…
Answer this question and get it marked →A uniform beam has a mass of 12 kg and a length of 4.0 m. The beam rests on horizontal ground. One end of the beam is now raised from the ground by a vertical force F. The other…
Answer this question and get it marked →A solid block of weight 14 N rests on a horizontal table. The pressure on the table due to the block is 70 Pa. What is the area of the surface of the block in contact with the…
Answer this question and get it marked →Which object is mainly responsible for the energy stored in tides in the sea? A Mars B the Earth C the Moon D the Sun
Answer this question and get it marked →Which statement about gas particles is not correct? A Increasing the temperature of a gas makes the gas particles move more slowly. B The gas particles are in constant random…
Answer this question and get it marked →Two methods of cooking are grilling under a red-hot heater and frying in a shallow metal pan. [Diagrams: method 1 = grilling (radiation through air), method 2 = frying (conduction…
Answer this question and get it marked →An object is placed in front of a plane mirror on a wall. What are the characteristics of the image formed? A same size as object and inverted top to bottom B same size as object…
Answer this question and get it marked →A ray of light in air enters glass at an angle of incidence of 34 degrees. The refractive index of glass is 1.5. What is the angle of refraction of the ray of light in the glass?…
Answer this question and get it marked →Which material is used for the core of an electromagnet? A aluminium B copper C iron D steel
Answer this question and get it marked →There is a current-carrying wire perpendicular to the page. The direction of the current is into the page. [Diagrams A-D: concentric circular field lines around the wire with…
Answer this question and get it marked →When a straight conductor moves through a magnetic field, an electromotive force (e.m.f.) is induced between the ends of the conductor. Which factor does not affect the magnitude…
Answer this question and get it marked →Cables transmit electrical power. The power input to the cables is constant, but the voltage input is increased. What happens to the power loss from the cables, and what happens…
Answer this question and get it marked →The diagram shows a current-carrying conductor in a magnetic field. The magnetic field is directed from the N pole (left) to the S pole (right) and the direction of the current is…
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