Physical factors determining the supply of energy — WJEC A-Level Geography Revision

    This topic examines the physical factors that determine the supply of energy, focusing on geological, climatic, relief, and environmental conditions that i

    Topic Synopsis

    This topic examines the physical factors that determine the supply of energy, focusing on geological, climatic, relief, and environmental conditions that influence the potential for various energy sources.

    Key Concepts & Core Principles

    Examiner Marking Points

    Physical factors determining the supply of energy

    WJEC
    A-Level

    This topic examines the physical factors that determine the supply of energy, focusing on geological, climatic, relief, and environmental conditions that influence the potential for various energy sources.

    0
    Objectives
    0
    Exam Tips
    0
    Pitfalls
    0
    Key Terms
    4
    Mark Points

    Topic Overview

    The supply of energy is fundamentally shaped by physical factors, including geology, climate, and geography. Geology determines the availability of fossil fuels like coal, oil, and natural gas, as well as uranium for nuclear power. For example, the UK's North Sea oil and gas reserves are trapped in porous sedimentary rocks, while coal seams are found in Carboniferous strata. Climate influences renewable energy potential: solar power requires high insolation, wind power needs consistent strong winds, and hydropower depends on reliable precipitation and relief. Geography affects accessibility and transport costs; remote or mountainous regions may have high potential but low exploitation due to infrastructure challenges.

    Understanding these physical factors is crucial because they dictate a country's energy mix and its vulnerability to price volatility or supply disruptions. For instance, Iceland's volcanic geology provides abundant geothermal energy, while Saudi Arabia's vast oil fields shape its economy. In the UK, the shift from coal to renewables is partly driven by physical constraints—coal reserves are depleting, while wind and tidal resources are abundant. This topic also links to energy security, climate change policy, and sustainable development, making it central to A-Level Geography.

    Physical factors interact with human factors (technology, economics, politics) to determine energy supply. For example, fracking has unlocked shale gas in the US, but its viability depends on geological conditions and water availability. Students should appreciate that physical factors are not deterministic; they create opportunities and constraints that societies respond to. This topic is assessed through case studies, such as the UK's energy transition or the development of solar power in the Sahara, requiring application of concepts to real-world contexts.

    Key Concepts

    Core ideas you must understand for this topic

    • →Geology: The type and structure of rocks determine the presence of fossil fuels (e.g., coal in sedimentary basins, oil in porous reservoirs) and geothermal energy (e.g., hot rocks near tectonic plate boundaries).
    • →Climate: Solar radiation, wind patterns, and precipitation affect renewable energy potential. For example, the UK's prevailing westerlies make wind power viable, while high-latitude countries have limited solar potential in winter.
    • →Relief and Hydrology: Steep gradients and high rainfall enable hydropower (e.g., Norway's fjords), while flat terrain may limit it. Tidal energy requires coastal geography with high tidal ranges (e.g., Severn Estuary).
    • →Accessibility and Location: Remote energy sources (e.g., Arctic oil, deep-sea gas) are costly to exploit, while proximity to markets reduces transport costs. Physical barriers like mountains or ice can hinder development.
    • →Resource Depletion: Physical factors include the finite nature of fossil fuels; reserves are concentrated in specific geological formations, leading to peak oil and eventual exhaustion.

    What You Need to Demonstrate

    Key skills and knowledge for this topic

    • Geological factors including physical reserves of fossil fuels and active areas for geothermal energy
    • Climatic factors including insolation rates and wind strength and reliability
    • Relief factors including suitable locations for dam construction and hydropower
    • Locations with favourable conditions for sustainable energy generation from waves, tides and biofuels

    Marking Points

    Key points examiners look for in your answers

    • Geological factors including physical reserves of fossil fuels and active areas for geothermal energy
    • Climatic factors including insolation rates and wind strength and reliability
    • Relief factors including suitable locations for dam construction and hydropower
    • Locations with favourable conditions for sustainable energy generation from waves, tides and biofuels

    Examiner Tips

    Expert advice for maximising your marks

    • 💡Use specific case studies to illustrate physical factors. For example, compare the UK's wind energy potential (high due to Atlantic depressions) with Spain's solar potential (high insolation). Mention actual locations like the London Array or the Severn Barrage to show depth.
    • 💡Link physical factors to energy security and sustainability. For instance, explain how reliance on imported fossil fuels (due to lack of domestic reserves) affects a country's vulnerability. Use terms like 'energy mix', 'diversification', and 'carbon footprint' to show wider understanding.
    • 💡Avoid generalisations; be precise about how a factor works. For example, 'geology' is not just about rocks—explain that porous sandstone traps oil, while impermeable cap rocks prevent escape. Show you understand the mechanism.

    Common Mistakes

    Pitfalls to avoid in your exam answers

    • Misconception: Renewable energy is always available everywhere. Correction: Renewables depend on physical factors; solar power is intermittent and varies with latitude, cloud cover, and season. Wind power is not constant, and hydropower can be reduced by drought.
    • Misconception: Physical factors alone determine energy supply. Correction: Human factors like technology (e.g., fracking, deep-sea drilling) and economics (e.g., subsidies, market prices) can overcome physical constraints or make them viable. For example, the UK's shale gas is technically recoverable but economically and politically controversial.
    • Misconception: Fossil fuels are evenly distributed. Correction: They are concentrated in specific geological settings (e.g., Middle East oil in anticlines, Russian gas in sedimentary basins). This creates geopolitical dependencies and energy security issues.

    Frequently Asked Questions

    Common questions students ask about this topic

    Before You Start

    Prior knowledge that will help with this topic

    • •Basic understanding of plate tectonics and rock types (sedimentary, igneous, metamorphic) to grasp how fossil fuels and geothermal energy form.
    • •Knowledge of global climate zones and weather systems (e.g., prevailing winds, ITCZ) to link climate to renewable energy potential.
    • •Familiarity with the concept of energy security and the UK's energy mix from earlier topics.

    Likely Command Words

    How questions on this topic are typically asked

    Examine
    Explain
    Assess

    Ready to test yourself?

    Practice questions tailored to this topic

    Related Topics in WJEC A-Level Geography

    Aeolian, fluvial and biotic processes, the characteristics and formation of landforms in coastal environments

    View Topic

    Biodiversity under threat

    View Topic

    Carbon stores in different biomes

    View Topic

    Catchment hydrology – the drainage basin as a system

    View Topic