IGCSE Sciences - Co-Ordinated (0654) — May–June 2023, Paper 63
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Fig. 1.1 shows a photograph of a flower with points A and B marked. In the box, make a large and detailed pencil drawing of the flower. Include the internal parts of the flower.
Answer this question and get it marked →A student investigates the action of three concentrations of an enzyme on milk protein. Milk looks white (opaque); when the protein is broken down it becomes clear. The student…
Answer this question and get it marked →A student investigates the rate of reaction between solution H and solution K (with starch, blue-black appears after a time). Procedure: 2 cm3 H, 8 cm3 distilled water, 5 drops…
Answer this question and get it marked →A student does a series of tests to identify solution L. Solution L gives: a white precipitate with both a few drops and excess aqueous sodium hydroxide; a colourless solution…
Answer this question and get it marked →A student measures the density of plasticine by two methods. Method 1: place a piece of plasticine on a top-pan balance and record the mass m. Fig. 5.1 shows the reading (84.6 g).…
Answer this question and get it marked →Plan an investigation to find out if the material from which a spring is made affects the extension of the spring when it is stretched by a load. You are provided with springs…
Answer this question and get it marked →