IGCSE Sciences - Co-Ordinated (0973) — May–June 2023, Paper 31
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 the alimentary canal and associated organs. Parts are labelled A to J. [Fig. 1.1: diagram of the human alimentary canal and associated organs with letters…
Answer this question and get it marked →An iron nail rusts when it is exposed to damp air. Rusting involves the oxidation of iron. State what is meant by the term oxidation.
Answer this question and get it marked →Fig. 3.1 shows a skier standing on the snow on skis. When she stands on the snow without her skis, she sinks into the snow. When she wears her skis, she can stand on the snow…
Answer this question and get it marked →Fig. 4.1 shows different sources of pollution of the water in seas as a pie chart: agriculture 27%, untreated sewage 27%, chemical waste from air pollution 18%, chemical waste…
Answer this question and get it marked →Substances are separated from mixtures of substances using different methods. Draw one straight line from each substance to the correct method of separating it from the mixture.…
Answer this question and get it marked →Complete the sentences to describe the energy changes that occur during the generation of electricity in a nuclear power station. Nuclear fission releases ............... energy…
Answer this question and get it marked →Fig. 7.1 is a drawing of a cross-section of a leaf, with parts labelled A (waxy outer layer), B (lower layer), C (pore on lower surface). State the names of the parts labelled A,…
Answer this question and get it marked →Complete the dot-and-cross diagram in Fig. 8.1 to show the bonding in a molecule of methane, CH4. Show only the outer-shell electrons. (Fig. 8.1 shows a central C atom bonded to…
Answer this question and get it marked →Fig. 9.1 shows a washing machine. The washing machine uses a heater to heat the water and a motor to pump the hot water through the machine. The motor and the heater are connected…
Answer this question and get it marked →A person touches a hot pan and instantly removes their hand. This is a reflex action. The reflex arc is shown in Fig. 10.1 (receptor in skin, neurone X, spinal cord, effector).…
Answer this question and get it marked →Limestone is insoluble in water. Limestone is mixed with water and poured through filter paper. Explain how filter paper separates limestone from water.
Answer this question and get it marked →The mass of the Sun is 1.97 x 10^30 kg. The average density of the Sun is 1410 kg/m3. Calculate the volume of the Sun.
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