IGCSE Sciences - Co-Ordinated (0973) — May–June 2025, Paper 61
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →A student investigates diffusion in animals. The student uses agar jelly cubes to represent different sized animals. Each cube contains a green coloured indicator that turns red…
Answer this question and get it marked →A student investigates an enzyme-controlled reaction. Yeast and some plants contain the enzyme catalase. Catalase speeds up the breakdown of hydrogen peroxide, releasing oxygen…
Answer this question and get it marked →A student investigates the neutralisation of dilute hydrochloric acid by aqueous sodium hydroxide. The student does two experiments, one with aqueous sodium hydroxide J, and the…
Answer this question and get it marked →An iron key is electroplated with copper metal using the apparatus shown in Fig. 4.1. The apparatus is a battery (positive and negative terminals) connected in a circuit with a…
Answer this question and get it marked →A student does an experiment to find the density of glass using solid glass marbles. Procedure. The student: uses a balance to find the mass m of 6 glass marbles; pours water into…
Answer this question and get it marked →A student does an experiment to find a value for the acceleration of free fall g using a pendulum. Procedure. The student: sets up a pendulum as shown in Fig. 6.1 (a pendulum bob…
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