IGCSE Sciences - Co-Ordinated (0654) — May–June 2023, Paper 62
7 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →A student investigates the effect of plants and animals on their aqueous environment. Three beakers are set up: A (water W and fish only), B (water W and plants only), C (water W…
Answer this question and get it marked →A student investigates three nutrient solutions D, E and F for reducing sugar. Add 2 cm3 of Benedict's solution to each and place in a hot water-bath for 3 minutes. The student…
Answer this question and get it marked →The seeds of a sycamore tree have 'wings' to help carry them in the wind. Plan an investigation to determine the relationship between the vertical height the seeds fall from and…
Answer this question and get it marked →A student investigates the rate of reaction between solutions H and K (with starch, blue-black appears after a time). Procedure: add 4 cm3 of H, 5 drops starch, 10 cm3 of K, swirl…
Answer this question and get it marked →A student identifies the ions in solutions L and M. Table 5.1 (cation tests): add a few drops of aqueous sodium hydroxide – L no ppt, M no ppt; add excess aqueous sodium hydroxide…
Answer this question and get it marked →A student measures the mass M of an object using a balancing method. The object is fixed with its centre over the 15.0 cm mark, the pivot under the 50.0 cm mark, and an 80 g mass…
Answer this question and get it marked →A student investigates the image formed by a convex lens (Fig. 7.1: lamp, illuminated object, convex lens in holder, screen; image distance y). The lens is placed u = 20.0 cm in…
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