SQA Higher Geography Physical Environments: a complete overview of the atmosphere, hydrosphere, lithosphere and biosphere

What Physical Environments actually demands

Physical Environments is the natural-systems half of Higher Geography. It covers four spheres: the atmosphere, the hydrosphere, the lithosphere and the biosphere. The examiners reward explanation, not just description: you must link a process to its result, use the correct terminology, and where the question allows, support your answer with a named Scottish landscape such as the Cairngorms.

This guide walks through all four key areas, then sets out the patterns the SQA repeats. Each key area has a matching dot-point page with practice questions; this overview ties them together.

Atmosphere and the global heat budget

The first key area asks why the Earth is heated unevenly and how that imbalance is corrected. Low latitudes have an energy surplus and high latitudes a deficit because of the angle of the Sun, the thickness of atmosphere the rays cross, and the albedo of polar ice. The surplus is redistributed polewards by the tri-cellular model (Hadley, Ferrel and Polar cells), by ocean currents such as the North Atlantic Drift, and by the migrating inter-tropical convergence zone.

Hydrosphere and drainage basins

The hydrosphere key area treats a drainage basin as an open system with inputs, stores, transfers and outputs. You read a storm hydrograph (discharge against time, with lag time) and explain how its shape depends on rock, slope, vegetation and land use. Fluvial erosion, transport and deposition create landforms from V-shaped valleys and waterfalls in the upper course to meanders, ox-bow lakes and floodplains lower down.

Lithosphere: glaciation and coasts

The lithosphere key area covers how ice and the sea shape the land. Glaciers erode by plucking and abrasion, producing corries, aretes, pyramidal peaks and U-shaped valleys, and deposit moraines and drumlins. At the coast, waves erode through hydraulic action, abrasion, attrition and solution to cut caves, arches, stacks and stumps, while longshore drift builds beaches, spits and bars. The Cairngorms provide classic glacial examples.

Biosphere: soils

The biosphere key area is about soil: how it forms from weathered rock, humus, air and water through the soil-forming factors, the soil profile and its horizons, and the three named soils. The podzol (leached, with an iron pan) is infertile; the brown earth is fertile and well mixed; the gley is waterlogged and blue-grey. You should be able to draw and annotate each profile.

How Physical Environments is examined

A typical SQA profile for this unit:

• Process and landform links. Explaining how a corrie, a waterfall or a spit forms, not just naming it.
• Systems thinking. Inputs, stores, transfers and outputs in the drainage basin; surplus and deficit in the heat budget.
• Annotated diagrams. Soil profiles, hydrographs and landform sketches gain marks.
• Named examples. Scottish landscapes such as the Cairngorms support landform answers.

Check your knowledge

A mix of recall and explanation questions covering Physical Environments. Attempt them, then check against the solutions.

1. Why do low latitudes receive a surplus of energy and high latitudes a deficit? (2 marks)
2. Name the four parts of the drainage-basin system. (2 marks)
3. What is the difference between plucking and abrasion? (2 marks)
4. State the order of features formed as a headland is eroded. (2 marks)
5. Describe two features of a podzol soil. (2 marks)
6. What does a flashy hydrograph tell you about a drainage basin? (1 mark)