Earth structure and plate tectonics — AS & A Level Marine Science (9693) questions by topic
Cross-sections of Earth's layers, completing a table of plate-boundary types, and explaining how mineral-laden fluid builds a hydrothermal-vent chimney are the recurring demands here, across just 12 real questions from 2023 to 2025 papers but with marks stretching from 5 to 14.
Explain, suggest, state, draw and identify lead the command list, and draw specifically means adding arrows or lines onto a given diagram accurately, not sketching from scratch. Examiners report vague or too-brief answers on continental-drift evidence, so checking a drafted response against instant marking quickly reveals whether named fossil species, matched mountain ranges, or a correctly perpendicular transform-boundary line were actually included.
What examiners look for
- A recurring criticism is answers too brief to credit, stating only 'fossil record' or 'plate tectonics' without further detail.
- Examiners note fossil evidence given as 'fossils on different continents' without specifying that they must be the same or similar species.
- Reports flag a table-completion error where the middle column, requiring two arrows on each diagram, was omitted entirely.
- A common error was failing to recognise that a transform boundary splits seabed rock perpendicular to the ridge.
- Strong answers identified convergent and divergent boundaries with a feature at each, named matching mountain ranges across continents, and drew the offset perpendicular to the magnetic stripe pattern correctly.
May–June 2025, Paper 11
Describe how underwater volcanoes form close to convergent plate boundaries.
Answer this question and get it marked →May–June 2024, Paper 12
Fig. 1.1 shows a section from the surface of the Earth to the centre of the Earth, drawn not to scale. The diagram shows a wedge with the ocean at the top, layer A at the surface…
Answer this question and get it marked →May–June 2024, Paper 13
Fig. 1.1 shows a section from the surface of the Earth to the centre of the Earth, drawn not to scale. The diagram shows a wedge with the ocean at the top, layer A at the surface…
Answer this question and get it marked →October–November 2024, Paper 11
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…
Answer this question and get it marked →October–November 2024, Paper 12
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…
Answer this question and get it marked →October–November 2024, Paper 13
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…
Answer this question and get it marked →October–November 2024, Paper 21
A major earthquake resulted in the formation of a tsunami. The earthquake occurred at the plate boundary shown in Fig. 7.1 (showing oceanic crust being subducted beneath…
Answer this question and get it marked →October–November 2024, Paper 22
A major earthquake resulted in the formation of a tsunami. The earthquake occurred at the plate boundary shown in Fig. 7.1 (showing oceanic crust being subducted beneath…
Answer this question and get it marked →October–November 2024, Paper 23
A major earthquake resulted in the formation of a tsunami. The earthquake occurred at the plate boundary shown in Fig. 7.1 (showing oceanic crust being subducted beneath…
Answer this question and get it marked →May–June 2023, Paper 11
The Earth's crust is made up of three types of tectonic plate boundaries. Complete Table 2.1. One row has been completed for you. Do not refer to earthquakes in your answer. Table…
Answer this question and get it marked →May–June 2023, Paper 12
Fig. 3.1 shows a view from above of paleomagnetic stripes on part of a sea bed. The key shows the ages of the rocks: lightest shade = 0-1 million years old; medium shade = 1-3…
Answer this question and get it marked →May–June 2023, Paper 13
Fig. 3.1 shows a view from above of paleomagnetic stripes on part of a sea bed. The key shows the ages of the rocks: lightest shade = 0-1 million years old; medium shade = 1-3…
Answer this question and get it marked →Other AS & A Level Marine Science topics
- Marine organisms and physiology (58)
- Water and physical oceanography (43)
- Mangroves and coastal ecosystems (37)
- Marine ecosystems and energy flow (36)
- Investigative skills (28)
- Fisheries and mariculture (26)
- Aquaculture (21)
- Human impacts and pollution (16)
- Classification and biodiversity (14)
- Coral reefs (14)
- Conservation and management (11)