IGCSE Science - Combined (0653) — May–June 2025, Paper 42
9 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Fig. 1.1 is a diagram of the digestive system and associated organs. The diagram labels five parts with letters: A (a small organ near the top, the salivary gland region), B (the…
Answer this question and get it marked →Fig. 2.1 shows the structure of a plant root. Two parts are labelled: F (an outward projection from a surface cell, on the left) and G (a central vascular tissue, on the right).…
Answer this question and get it marked →A person is infected by a pathogen. A few months later they are infected again by the same pathogen. Fig. 3.1 shows how the number of antibodies in the body of the person changes…
Answer this question and get it marked →Sodium fluoride, NaF, is an ionic compound. Tick all the boxes that are properties of sodium fluoride. - high boiling point [ ] - insoluble in water [ ] - conducts electricity…
Answer this question and get it marked →Calcium oxide, CaO, is used to make cement. Calcium oxide is formed by the decomposition of calcium carbonate, CaCO3, at a very high temperature. The equation for the reaction is…
Answer this question and get it marked →Alkanes and alkenes are two different homologous series. State two general characteristics of a homologous series. 1 .......... 2 ..........
Answer this question and get it marked →Fig. 7.1 shows a tram powered by electricity supplied through overhead cables. The tram accelerates horizontally along a level track. Four forces act on the tram: S (vertically…
Answer this question and get it marked →A student constructs an electrical circuit containing a metal heating element. Fig. 8.1 shows the circuit diagram. The circuit contains an a.c. power supply, a switch, the metal…
Answer this question and get it marked →Complete the sentence about the Solar System. The Sun contains most of the .......... of the Solar System and this explains why the planets orbit the Sun.
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