IGCSE Science - Combined (0653) — October–November 2024, Paper 42
9 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →(a) Fig. 1.1 shows sections through two different flowers, X and Y. Flower X is an insect-pollinated flower; flower Y is a wind-pollinated flower. (a)(i) Draw a label line with…
Answer this question and get it marked →Lithium, sodium, potassium and rubidium are elements in Group I of the Periodic Table. (a) Group I elements react with water. (a)(i) State the names of the two products formed…
Answer this question and get it marked →Fig. 3.1 shows an electric car with solar cells on its roof. (a) Complete the sentences about energy transfer. The solar cells absorb light from the Sun. The solar cells charge…
Answer this question and get it marked →(a) Fig. 4.1 shows drawings of three different blood vessels, W (thick-walled, medium lumen = artery), X (thin-walled, very small lumen = capillary), and Y (thick wall, large…
Answer this question and get it marked →(a) State the names of two elements that are used to make inert electrodes for electrolysis.
Answer this question and get it marked →(a) Fig. 6.1 shows a circuit with two resistors, X and Y, connected in series, with ammeter P in the main circuit and voltmeter V across both X and Y. Resistor X has a resistance…
Answer this question and get it marked →(a) Fig. 7.1a shows a model of an enzyme (with an active site). Fig. 7.1b shows four possible substrates, A–D, for this enzyme. Identify which substrate, A–D, is the substrate for…
Answer this question and get it marked →Carbon dioxide is a gas in air. (a) Dilute hydrochloric acid reacts with calcium carbonate to form carbon dioxide. State the names of the two other products formed when dilute…
Answer this question and get it marked →Fig. 9.1 shows a candle made of wax. (a) A thin converging lens is used to focus light from the candle. Fig. 9.2 shows three rays of light incident on the lens (three parallel…
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