IGCSE Sciences - Co-Ordinated (0654) — 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 a genetic condition called cystic fibrosis. The allele for cystic fibrosis is recessive a. The allele for no cystic fibrosis…
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 nuclear fission of uranium releases thermal energy. The thermal energy produced is used to convert water…
Answer this question and get it marked →A student investigates the effect of different types of sugar on the anaerobic respiration in yeast. She mixes yeast with five different types of sugar solutions of the same…
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 the results (enzyme activity / arbitrary units on the y-axis 0-120,…
Answer this question and get it marked →Non-metallic elements exist as simple molecules with covalent bonds. Non-metallic elements can also exist as giant covalent structures. Oxygen is a simple molecule with covalent…
Answer this question and get it marked →A student is investigating electromagnetic induction by dropping a magnet through a coil of wire. The coil is connected to a device which measures the e.m.f. induced. Fig. 9.1…
Answer this question and get it marked →Fig. 10.1 shows aerial photographs of the same area taken at different times. Photograph A was taken in 1985 and photograph B in 2000. Areas of forest are darker and areas that…
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. The angle of incidence (in air) is 53 degrees and the angle of refraction (in the glass) is 31 degrees. Use…
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