IGCSE Science - Combined (0653) — May–June 2025, Paper 33
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 female reproductive system. The diagram is labelled with the letters A, B, C, D and E pointing to different structures (A points to a structure at the…
Answer this question and get it marked →A student investigates the effect of different physical activity on heart rate. Fig. 2.1 is a bar chart of the results, showing heart rate in beats per minute for five types of…
Answer this question and get it marked →Fig. 3.1 shows part of a food web from a coral reef habitat. The arrows show: phytoplankton → zooplankton; phytoplankton → unicornfish; zooplankton → unicornfish; zooplankton →…
Answer this question and get it marked →Lithium fluoride, LiF, is an ionic compound. Complete the sentences to explain why lithium fluoride has a high melting point. Choose words from the list. Each word may be used…
Answer this question and get it marked →Dilute sulfuric acid is used in an electrolysis experiment. Universal indicator is used to measure the pH of the dilute sulfuric acid. Describe how to use universal indicator to…
Answer this question and get it marked →Scientists are investigating the use of iron as a fuel in cars. Iron reacts with oxygen, as shown in equation 1. This reaction releases energy. The iron oxide formed is converted…
Answer this question and get it marked →Fig. 7.1 shows a toy car, powered by a battery. The diagram shows the car with a driving force D acting horizontally to the right (arrow labelled D) and a total friction force F…
Answer this question and get it marked →Fig. 8.1 shows a Bunsen burner with the air hole closed, burning with a yellow flame. The diagram is labelled with yellow flame, air hole closed, natural gas (entering the base),…
Answer this question and get it marked →Fig. 9.1 shows a large telescope used for studying the Solar System. Fig. 9.2 shows the Sun and the eight planets in the Solar System (not to scale), with the Sun, Earth and…
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