IGCSE Science - Combined (0653) — October–November 2024, Paper 63
4 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →A student investigates phototropism in a plant. Phototropism is a response in which parts of a plant grow towards the direction from which light is coming. Fig. 1.1 shows a plant…
Answer this question and get it marked →A student prepares a pure dry sample of the insoluble salt, barium sulfate. Procedure: step 1 puts 75 cm³ of aqueous sodium sulfate into a beaker; step 2 adds an excess of aqueous…
Answer this question and get it marked →Antacids are used to neutralise excess acid in the stomach. Stomach acid has a pH of 2. When antacid is added to stomach acid, the pH increases. Plan an investigation to determine…
Answer this question and get it marked →A student investigates the effects of two factors on the period T of a simple pendulum. The period T of a pendulum is the time for one oscillation (swing). Fig. 4.1 shows a…
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