IGCSE Sciences - Co-Ordinated (0654) — October–November 2024, Paper 12
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →What are two of the characteristics of all living organisms? A breathing and respiration B egestion and excretion C movement and sensitivity D nutrition and photosynthesis
Answer this question and get it marked →Which statements about cell structure are correct? 1 Animal cells have cell membranes but no cell walls. 2 Animal cells have cell membranes and cell walls. 3 Plant cells have cell…
Answer this question and get it marked →What is required to test for the presence of a reducing sugar (choosing among Benedict's solution, biuret solution, heat)? A Benedict's solution only B biuret solution and heat C…
Answer this question and get it marked →The graph shows the effect of increasing temperature on the rate of an enzyme-controlled reaction. Which statement describes what is happening between 10 degrees C and 30 degrees…
Answer this question and get it marked →What are the products of photosynthesis in a green plant? A carbon dioxide and water B glucose and carbon dioxide C oxygen and glucose D oxygen and water
Answer this question and get it marked →The diagram shows human teeth in the lower jaw, with a tooth labelled X (a pointed tooth at the front-side of the jaw). Which type of tooth is X? A canine B incisor C molar D…
Answer this question and get it marked →The diagram shows an investigation into water transport in plants: a flower with white petals in water with coloured dye, and 8 hours later the petals are dyed. Which part of the…
Answer this question and get it marked →Which row shows the changes that occur during exercise (breathing rate / depth of breathing)? A increases / increases B increases / stays the same C stays the same / increases D…
Answer this question and get it marked →Which activities increase the secretion of adrenaline in the human body (choosing among running to catch a bus, relaxing in the sun, watching a frightening horror film)? A running…
Answer this question and get it marked →The roles of oxygen, water and light in seed germination are investigated. Set-ups include: no light (wet cotton wool); no water; no oxygen (alkaline pyrogallol removes oxygen,…
Answer this question and get it marked →In a plant, the allele for red flowers is dominant to the allele for yellow flowers. A heterozygous red-flowered plant is crossed with a homozygous yellow-flowered plant. Which…
Answer this question and get it marked →Which definition is correctly matched to a type of organism? A producer: an organism that gets its energy by feeding on other organisms B consumer: an organism that gets its…
Answer this question and get it marked →Which row about a process in the carbon cycle is correct (process / effect on level of atmospheric carbon dioxide)? A combustion / decreases B decomposition / increases C…
Answer this question and get it marked →Calcium carbonate reacts with dilute hydrochloric acid in a flask. The reaction releases carbon dioxide gas. The decrease in the mass of the flask and its contents is measured…
Answer this question and get it marked →Which process involves a chemical change? A burning a wooden splint B dissolving sodium chloride in water C evaporating water D distilling petroleum
Answer this question and get it marked →Which formula contains the most elements? A NaOH B Rb2S C SiCl4 D SnO2
Answer this question and get it marked →What are the products of the electrolysis of dilute sulfuric acid using inert electrodes? A hydrogen and sulfur dioxide B oxygen and hydrogen C oxygen and sulfur D oxygen and…
Answer this question and get it marked →Some observations about two reactions are shown. In reaction 1, heat is taken in from the surroundings. In reaction 2, heat is released to the surroundings. Which row describes…
Answer this question and get it marked →Four beakers each contain 50 cm^3 dilute hydrochloric acid of equal concentration. 50 cm^3 of water is added to two of the beakers. 4.0 g magnesium carbonate is then added to each…
Answer this question and get it marked →A piece of magnesium ribbon is placed in dilute hydrochloric acid. The magnesium reacts and bubbles of a colourless gas are formed. What is the word equation for this reaction? A…
Answer this question and get it marked →Which chemical test does not produce a precipitate? A carbon dioxide and limewater B carbonate ions and dilute hydrochloric acid C chloride ions and aqueous silver nitrate D…
Answer this question and get it marked →Which statement about the halogens is correct? A They become lighter in colour down the group. B They are all gases at room temperature. C They are members of the same period of…
Answer this question and get it marked →How is iron oxide converted to iron? A oxidation using water B reaction with hydrochloric acid C reaction with sodium hydroxide D reduction using carbon
Answer this question and get it marked →Which volume of clean air contains 10.5 cm^3 of oxygen? A 21 cm^3 B 42 cm^3 C 50 cm^3 D 100 cm^3
Answer this question and get it marked →What are two uses of limestone (1 as a fertiliser; 2 to decrease the pH of soil; 3 making lime; 4 neutralising some industrial waste products)? A 1 and 2 B 1 and 4 C 2 and 3 D 3…
Answer this question and get it marked →Petroleum is separated into fractions by fractional distillation. Which row shows a use for the named fraction? A bitumen: feedstock for making chemicals B diesel oil / gas oil:…
Answer this question and get it marked →Which statement about addition polymerisation is correct? A Large monomer units join to form small polymer molecules. B Large polymer molecules join to form small monomer units. C…
Answer this question and get it marked →An object has a weight of 2.0 N. The gravitational field strength g is 10 N / kg. What is the mass of the object? A 0.020 kg B 0.20 kg C 2.0 kg D 20 kg
Answer this question and get it marked →The diagram shows four containers resting on a table. The containers have equal masses and square bases of equal areas. The centre of mass of each container is labelled X. Which…
Answer this question and get it marked →A worker exerts a force on a box to move it across a horizontal surface. Which of the two quantities (magnitude of the force / distance moved by the box) affect the amount of work…
Answer this question and get it marked →What is the useful energy transfer in a wind turbine? A electrical energy to thermal energy B gravitational potential energy to kinetic energy C kinetic energy to electrical…
Answer this question and get it marked →What are the names for the changes of state between solids, liquids and gases (solid to liquid / liquid to gas)? A melting / condensation B melting / evaporation C solidification…
Answer this question and get it marked →The diagrams show part of a water-heating system working by convection, with a hot water tank, a boiler and a heat source. Which diagram shows the flow of water in the system (hot…
Answer this question and get it marked →The diagram represents a wave (displacement against distance) with points X and Y marked. How many wavelengths are there between X and Y? A 2/3 B 1 C 1 1/2 D 3
Answer this question and get it marked →The diagram shows a battery connected to a 0.50 ohm resistor and an ammeter. The reading on the ammeter is 0.20 A. What is the potential difference (p.d.) across the resistor? A…
Answer this question and get it marked →The diagram shows a circuit containing two resistors of resistance R and 2R (connected in parallel) and two ammeters X and Y. Which ammeter shows the larger reading and what is…
Answer this question and get it marked →An electrician has a box of identical fuses that do not have their rating marked on them. They decide to test one of the fuses to determine its rating by gradually increasing the…
Answer this question and get it marked →The diagrams show patterns around a wire that is carrying a current in the direction shown. Which diagram shows the pattern and the direction of the magnetic field caused by the…
Answer this question and get it marked →A nucleus has atomic number Z and mass number A. What is equal to the value of A - Z? A the number of electrons orbiting the nucleus B the number of neutrons in the nucleus C the…
Answer this question and get it marked →A radioactive isotope emits only alpha-particles. A sample of the isotope emits 2000 alpha-particles per second. After 30 minutes, the sample emits 250 alpha-particles per second.…
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