Five pages covering everything Paper 1 and Paper 2 examine at AS Level, with the data-handling skills Paper 2 is built on.
Water: particle theory, solubility, density and pressure
This is the chemistry that the rest of the marine course sits on: why water dissolves salt but not oil, why ice floats, why the deep ocean is cold and dense, and why warm...
8 questions · 27 marks
Revise this topicTectonic processes, weathering, tides and ocean currents
The sea floor is built and destroyed by moving plates, the coast is shaped by the balance between weathering, erosion and deposition, and the water itself moves under the...
8 questions · 28 marks
Revise this topicInteractions, feeding relationships and nutrient cycles
Organisms in the sea live in symbiotic relationships, feed in chains and webs, and depend on a reservoir of dissolved nutrients that is constantly being used up and repla...
8 questions · 27 marks
Revise this topicClassification, biodiversity and populations
This topic is mostly precise vocabulary, and that is exactly where the marks go: examiners want 'pentaradial symmetry' and 'two pairs of antennae', not a general descript...
8 questions · 27 marks
Revise this topicThe open ocean, coral reefs, rocky and sandy shores, and mangroves
Five very different ecosystems, and the examiners test each one the same way: name the zone or the organism, then explain the physical condition that controls it. The ope...
8 questions · 29 marks
Revise this topic