IGCSE Sciences - Co-Ordinated (0654) — October–November 2023, Paper 43
12 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 medical notes from a person at risk of developing coronary heart disease (CHD): Age 68; Family history: No coronary heart disease in the family; Other notes: smokes…
Answer this question and get it marked →This question is about metals. Aluminium is used to make aircraft. Identify from the list below one property of aluminium that makes it suitable for this purpose. good conductor…
Answer this question and get it marked →Meteoroids are lumps of rock which travel through space. During its journey through space, a meteoroid travels at a constant speed of 25 000 m / s. Calculate the time taken for…
Answer this question and get it marked →A scientist compares the relative concentrations of bacteria and dissolved oxygen in a river before and after fertiliser is added. Fig. 4.1 is a graph of the results (relative…
Answer this question and get it marked →Particles can be atoms, ions or molecules. Particles either form pure substances or mixtures. Draw one line from each word (atom, element, ion, mixture, molecule) to the correct…
Answer this question and get it marked →Fig. 6.1 shows an electric refrigerator (with temperature control and a cooling unit). The cooling unit inside the refrigerator is placed at the top. State the name of the process…
Answer this question and get it marked →Fig. 7.1 is a diagram of a cross-section of a leaf, with parts labelled A, B, C and D. State the names of the parts labelled A and B in Fig. 7.1. A ... B ...
Answer this question and get it marked →Electrolysis is used to break down ionic compounds. Complete the sentences about electrolysis. Choose words from the list. Each word may be used once, more than once, or not at…
Answer this question and get it marked →Tellurium is a rare element which exists as several isotopes, some of which are unstable. A nucleus of tellurium-109 decays by emitting an alpha-particle. Describe the effect of…
Answer this question and get it marked →Fig. 10.1 shows the effect of adrenaline on blood glucose concentration (blood glucose concentration g / m3, 800-2000, against time / minutes 0-50; adrenaline released at time 0).…
Answer this question and get it marked →An aqueous solution of dilute hydrochloric acid is acidic. Suggest the pH of an aqueous solution of dilute hydrochloric acid.
Answer this question and get it marked →A student investigates light dependent resistors (LDRs). Fig. 12.1 shows the circuit the student uses (variable power supply, ammeter A, LDR). The ammeter in Fig. 12.1 reads 0.24…
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