IGCSE Science - Combined (0653) — May–June 2023, Paper 62
4 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 section through okra, a fruit which contains five seeds (with points A and B marked across a diameter). In the box provided, draw a large, clear pencil drawing of…
Answer this question and get it marked →The enzyme amylase breaks down starch to form a reducing sugar. Iodine is a brown solution that turns blue/black in the presence of starch. Plan an investigation to determine the…
Answer this question and get it marked →A student investigates a white solid H. Procedure: measure the mass of an empty test-tube (16.23 g, recorded in Table 3.1); place some solid H into the test-tube; measure the mass…
Answer this question and get it marked →A student determines the focal length F of a convex lens (Fig. 4.1: illuminated triangular object at 0 cm, lens at distance u, screen at distance v, total distance D, on a metre…
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