IGCSE Sciences - Co-Ordinated (0973) — May–June 2023, Paper 42
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 the eye with parts labelled A to H. State the letter in Fig. 1.1 which identifies the part that contains: circular and radial muscles ...;…
Answer this question and get it marked →Alkanes are saturated hydrocarbons. State what is meant by the term saturated hydrocarbon.
Answer this question and get it marked →Fig. 3.1 shows a pond skater spreading its weight over its 6 legs to move over the surface of water. The pond skater has a mass of 0.25 g and is stationary on the surface of the…
Answer this question and get it marked →Photosynthesis is an enzyme-controlled reaction. Fig. 4.1 is a graph showing the effect of temperature on the rate of photosynthesis (rate rises to a peak around 35-40 C then…
Answer this question and get it marked →Ammonia is made from the reaction of nitrogen and hydrogen in the Haber process: N2 + 3H2 - 2NH3 (reversible). State the sources of the nitrogen and hydrogen used in the Haber…
Answer this question and get it marked →Fig. 6.1 shows the average power output over a summer's day from a solar panel (power output / kW vs time of day, peaking around midday). State the time at which the power output…
Answer this question and get it marked →Fig. 7.1 shows a food web with corn and mango (producers), grasshopper and fruit fly, rat and frog and dragonfly, snake, and eagle. Use the information in Fig. 7.1 to state the…
Answer this question and get it marked →Copper has two isotopes, copper-63 and copper-65. Table 8.1 shows information about copper-63 and copper-65 (proton/atomic number, nucleon/mass number, protons, neutrons,…
Answer this question and get it marked →A student investigates series and parallel circuits using filament lamps. Fig. 9.1 shows the first circuit using three identical filament lamps in series across a 6.0 V supply,…
Answer this question and get it marked →Fig. 10.1 is a diagram of a sperm cell in humans, with cell structure X (the head/nucleus) and part Y (the midpiece) labelled. Cell structure X contains unpaired chromosomes.…
Answer this question and get it marked →Electrolysis is the breakdown of an ionic compound, when molten or in aqueous solution, by the passage of electricity. Table 11.1 shows the products of electrolysis of some…
Answer this question and get it marked →Table 12.1 shows information about three types of ionising radiation (nature, relative ionising effect, relative penetrating ability): alpha (nature ?, ionising effect high,…
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