AS & A Level Marine Science (9693) — October–November 2024, Paper 12
7 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Sea water contains many dissolved salts, including sodium chloride. Complete Fig. 1.1 to show the electron arrangement of a chlorine atom.
Answer this question and get it marked →Crown-of-thorns starfish (COTS), Acanthaster planci, are echinoderms that feed on coral. State two features typical of echinoderms.
Answer this question and get it marked →Manatees are large marine mammals that feed on seagrass in Florida. Fig. 3.1 shows a seagrass plant. Label four features of the seagrass plant shown in Fig. 3.1.
Answer this question and get it marked →Fig. 4.1 shows a rocky shore with zones labelled P, Q, R, S and T. Name zones P and R.
Answer this question and get it marked →Mangrove forests grow in tropical and subtropical coastal areas where there is an estuary. Explain how sediment is formed and deposited in estuaries where mangroves grow.
Answer this question and get it marked →Sea ice floats on the surface of polar seas. The ice forms when the temperature of sea water falls to −1.8 °C. Describe how hydrogen bonds form between water molecules and explain…
Answer this question and get it marked →Hydrothermal vents are found on the ocean floor. Fig. 7.1 shows a hydrothermal vent. Hydrothermal vents form chimneys made of minerals. Explain the processes that lead to a…
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