IGCSE Sciences - Co-Ordinated (0654) — May–June 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 is a diagram of parts of a tooth with parts labelled A, B, C, D, E, F (top to bottom). State the letters from Fig. 1.1 that identify two parts that are dissolved by acid…
Answer this question and get it marked →A student investigates the reaction between calcium carbonate, CaCO3, and dilute hydrochloric acid, HCl. Calcium chloride, CaCl2, water and carbon dioxide are made. Construct the…
Answer this question and get it marked →Fig. 3.1 shows an iceberg floating in the sea. The density of the iceberg is 920 kg/m3 and the volume is 2 × 10⁵ m³. Calculate the mass of the iceberg.
Answer this question and get it marked →Fig. 4.1 is a graph showing the effect of temperature on the rate of transpiration in one leaf (rate against leaf temperature 25–45 °C). Complete the sentences to describe and…
Answer this question and get it marked →Lithium, sodium and potassium are metals in Group I. Describe the trend in reactivity of the Group I elements down the group.
Answer this question and get it marked →Fig. 6.1 shows wind turbines used to generate electricity. Fig. 6.2 shows how the power output of one wind turbine changes with wind speed (power output/kW against wind…
Answer this question and get it marked →Albinism is an inherited condition giving no skin pigments. The allele for albinism is recessive a; for no albinism dominant A. Fig. 7.1 is a pedigree chart of albinism in one…
Answer this question and get it marked →Petroleum is separated into different fractions. Fig. 8.1 shows the percentage composition: gasoline 46%, diesel oil 26%, other products 11%, jet fuel 9%, heavy fuel oil 4%,…
Answer this question and get it marked →Fig. 9.1 shows a butterfly resting on a leaf attached to a branch, with pivot point X, force F applied at the butterfly, distance 5.0 cm. State the name of the force labelled F.
Answer this question and get it marked →The pH of the fluid in muscles changes during vigorous exercise due to lactic acid. Table 10.1: pH before exercise 7.08, immediately after 6.58. Calculate the decrease in pH shown…
Answer this question and get it marked →Element X is found in Group II of the Periodic Table. State the formula of the ion formed by element X. Tick one box: X2− / X6− / X2+ / X6+.
Answer this question and get it marked →X-rays are part of the electromagnetic spectrum; hospitals use X-rays for medical imaging. State the speed of X-rays.
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