IGCSE Sciences - Co-Ordinated (0973) — October–November 2023, Paper 41
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 is a pedigree diagram for the inheritance of cystic fibrosis. The allele for cystic fibrosis is recessive (a); the allele for no cystic fibrosis is dominant (A). Two…
Answer this question and get it marked →Crude oil contains hydrocarbon molecules. State what is meant by a hydrocarbon.
Answer this question and get it marked →Nuclear power stations use nuclear fission to generate electricity. The fission of uranium releases thermal energy, used to convert water into steam to drive turbines. State one…
Answer this question and get it marked →A student investigates the effect of different types of sugar on anaerobic respiration in yeast. She mixes yeast with five different sugar solutions of the same concentration and…
Answer this question and get it marked →The pH of a solution describes how acidic or alkaline it is. State which of these values shows the pH of a strong acid. Tick one box: 14; 7; 5; 1.
Answer this question and get it marked →Fig. 6.1 shows a bee collecting pollen from a flower. The maximum speed of a bee is 5.8 m/s. Calculate the maximum distance a bee can travel in 60 seconds.
Answer this question and get it marked →A scientist measures the activity of the enzyme amylase at different temperatures. Fig. 7.1 shows a graph of enzyme activity / arbitrary units against temperature / C (rising to…
Answer this question and get it marked →Non-metallic elements exist as simple molecules with covalent bonds and can also exist as giant covalent structures. Oxygen is a simple molecule with covalent bonds. Table 8.1…
Answer this question and get it marked →A student investigates electromagnetic induction by dropping a magnet (N at top, S at bottom) through a coil of wire connected to a device measuring induced e.m.f. (Fig. 9.1).…
Answer this question and get it marked →Fig. 10.1 shows aerial photographs of the same area taken in 1985 (A) and 2000 (B); forest is darker and cleared areas are lighter, showing deforestation. The change between 1985…
Answer this question and get it marked →Molten lead(II) bromide conducts electricity. When molten lead(II) bromide is electrolysed, lead is made at the cathode. State the product at the anode.
Answer this question and get it marked →Fig. 12.1 shows a ray of light refracted as it enters a glass block, with an angle of incidence of 53 degrees and an angle of refraction of 31 degrees. Use Fig. 12.1 to calculate…
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