Edexcel International GCSE Geography (4GE1) · Economic Activity & Energy
Mini-Lesson
Economic Activity & Energy
This mini-lesson walks you through the whole of the Edexcel iGCSE (4GE1) Economic Activity & Energy unit: the economic sectors, how employment shifts with development, what fixes the location of activity, globalisation & TNCs, the informal sector, and then energy — sources, security, and managing it sustainably.
Work through each screen, answer the questions as you go (some are wordy, some are short-answer) and collect ⭐ stars. Press Start when you're ready.
4.1 · Economic sectors
Four sectors of the economy
Every job is classified into one of four sectors by what it actually produces:
Primary — extracting raw materials from the earth or sea (farming, fishing, mining, forestry).
Secondary — manufacturing: turning raw materials into finished products (factory work, steel-making, car assembly).
Tertiary — services: doing something for people (retail, teaching, nursing, banking, transport).
Watch out: the quaternary sector (research & information) is not the same as the "quinary" sector. Edexcel 4GE1 uses four sectors — don't invent a fifth.
Quick check
Which sector?
?A scientist develops new software for a biotech firm. Which economic sector is this job in?
Measuring the balance
How we measure economic activity
Geographers describe a country's employment structure — the proportion of workers in each sector. It can be measured by:
the percentage of the workforce employed in each sector;
the percentage of GDP (national output) each sector contributes.
A poorer, less developed country usually has most workers in the primary sector. A richer, more developed country has few in primary and most in tertiary & quaternary.
Key idea: the balance is not fixed — the employment structure shifts as a country develops. That shift is the heart of the next screen.
The Clark-Fisher model
Employment shifts with development
The Clark-Fisher model shows how the share of workers in each sector changes as a country moves from pre-industrial → industrial → post-industrial:
Primary falls; secondary rises in a hump then declines (de-industrialisation); tertiary rises steadily; quaternary grows late.
Drivers of the shift:mechanisation cuts primary & secondary jobs; de-industrialisation and the global shift move manufacturing abroad; rising education and incomes boost demand for tertiary/quaternary services.
Quick check
Reading the model
?According to the Clark-Fisher model, what happens to primary sector employment as a country becomes more developed?
Match it
Sector ↔ example
Tap a job on the left, then its correct sector on the right.
Location of economic activity
What fixes where activity locates?
Firms don't set up just anywhere. Their location is shaped by a mix of factors:
Physical — raw materials, relief, climate, water, a port or coastal site.
Labour — a skilled or a cheap workforce, depending on the industry.
Transport & markets — road, rail, ports, airports; closeness to customers.
Capital & land — money to invest and affordable, available land.
Government — grants, tax breaks, enterprise zones, or planning rules.
Changing pull: heavy industry once located near coalfields and ports; modern quaternary/tech firms are footloose — they follow skilled labour, universities and good communications rather than raw materials.
Quick check
Choosing a site
?A high-tech quaternary "science park" is described as footloose. Which location factor matters most to it?
Globalisation & TNCs
Globalisation and TNCs
Globalisation is the growing connection of the world's economies — the freer movement of goods, money, ideas and people. It has been driven by cheaper transport, containerisation and the internet.
A Transnational Corporation (TNC) is a large company that operates in more than one country — usually with its headquarters in a developed country and factories where labour is cheaper. This is the global shift of manufacturing.
TNCs — the two-sided balance:
Advantages for the host country: jobs created, wages & skills raised, investment and infrastructure, boosts exports and the multiplier effect.
Disadvantages: low pay & poor working conditions, profits sent ("repatriated") back to the home country, local firms undercut, pollution, and jobs can be moved away again.
Explain
Your turn — a TNC benefit
✍️State one advantage and one disadvantage that a TNC brings to a host (developing) country. Write a sentence for each, then reveal the model answer.
Model answer:Advantage — the TNC creates thousands of jobs and pays wages, which raises living standards and can trigger a multiplier effect as workers spend locally. Disadvantage — wages and working conditions are often poor, and most profits are repatriated to the TNC's home country rather than staying in the local economy.
You earn the star for having a go — compare yours with the model.
Located case study · TNC
Case study: Apple & Foxconn
Apple is a US-headquartered TNC. It designs its products in California (quaternary work) but has most of them assembled in China by its supplier Foxconn — for example at the huge plant in Zhengzhou ("iPhone City"), Henan Province.
Key facts:
The Zhengzhou site has employed over 200,000 workers at peak production.
Host benefits (China): mass employment, transfer of skills & technology, huge export earnings.
Host costs (China): reports of long hours, low pay and stressful conditions; profits flow back to the USA.
Home effect (USA): high-skill design & profit stay in California, but assembly jobs are lost overseas.
This one supply chain shows globalisation in action: design in a developed country, manufacture in an emerging one.
Quick check
Apple & Foxconn
?Apple designs in California but assembles through Foxconn in Zhengzhou, China. This is a clear example of which process?
The informal sector
The informal sector
In many developing and emerging cities a large share of people work in the informal sector — jobs that are not officially recorded, taxed or regulated.
Examples: street vendors, shoe-shiners, waste-pickers, rickshaw drivers, market traders.
Features: low and irregular pay, no contract, no job security, often unsafe, sometimes uses child labour.
Why it exists: rapid rural-to-urban migration means the formal economy cannot create enough jobs, so people make their own work to survive.
Two sides: the informal sector provides vital income and cheap services, but the government collects no tax from it and workers have no protection.
Quick check
Formal or informal?
?Which of these is a typical job in the informal sector?
Impacts & sustainability
Economic activity uses resources
Every sector places demands on resources, and growth can strain the environment:
Primary — mining, logging and over-fishing can exhaust resources and destroy habitats.
Secondary — factories consume energy and raw materials and can pollute air and water.
Tertiary/quaternary — lighter on raw materials, but still use large amounts of energy (offices, data centres, transport).
Sustainable development means meeting today's needs without preventing future generations from meeting theirs — using resources efficiently, recycling, and controlling pollution.
Link to energy: because all activity needs power, managing energy sustainably is central to sustainable economic growth — which is where the second half of this unit goes.
4.3 · Energy sources
Renewable vs non-renewable
Energy sources split into two groups. Non-renewable sources are finite — once used they are gone. Renewable sources are naturally replaced and won't run out on a human timescale:
Watch out: renewable does not automatically mean "clean, cheap or reliable". Biomass is renewable but still releases CO₂ when burned; HEP dams are costly and flood land; solar & wind are intermittent. And nuclear is non-renewable but produces very little CO₂.
Sort it
Renewable or non-renewable?
Tap a source, then tap the box it belongs in.
♻️ Renewable
⛽ Non-renewable
Weighing the sources
Advantages & disadvantages
Fossil fuels (coal, oil, gas) — reliable and high energy output, but finite and release CO₂ and air pollution.
Nuclear — huge, reliable output with very low CO₂, but high build cost and dangerous, long-lived radioactive waste.
HEP — reliable and low-carbon, but dams are expensive and flood land, displacing people.
Wind — clean and free fuel, but intermittent (needs wind) and visual/noise impacts.
Solar — clean and good in sunny areas, but gives no output at night and less in cloudy climates.
Geothermal — reliable and low-carbon, but only viable where the crust is hot near the surface.
Trade-off: there is no perfect source — countries choose an energy mix to balance cost, reliability, security and the environment.
Quick check
Choosing a source
?A country wants a source that gives a large, reliable output day and night with very low CO₂, but is willing to manage hazardous waste. Which fits best?
Production, consumption & security
Global patterns & energy security
Global energy demand is rising as population grows, countries develop and industry expands. But production and consumption are uneven: wealthy and rapidly industrialising countries consume far more per person than the poorest.
A typical world energy mix — fossil fuels dominate, so demand and supply are closely linked to imports.
Energy security = having a reliable, affordable, uninterrupted supply. A country is insecure if it depends heavily on imported fuel, so prices and politics abroad can cut off its supply.
Explain
Your turn — energy security
✍️Explain one reason a country that imports most of its energy may have low energy security. Write a sentence, then reveal the model answer.
Model answer: An importing country depends on foreign suppliers, so if prices rise, a supplier cuts exports, or a political dispute or war disrupts a pipeline, its supply can be interrupted. It cannot fully control its own energy, which lowers its energy security.
You earn the star for having a go — compare yours with the model.
Managing energy sustainably
Making energy sustainable
Because fossil fuels are finite and warm the climate, countries try to make their energy use more sustainable in two ways:
Increase supply cleanly — invest in renewables (wind, solar, HEP, geothermal) and nuclear to cut CO₂.
Reduce demand & waste — energy conservation: insulation, efficient appliances, public transport, smart meters and education.
Key point: sustainable energy management balances economic needs (affordable power for industry), social needs (jobs, warm homes) and the environment (lower emissions) — for both today and future generations.
Located case study · energy scheme
Case study: the Three Gorges Dam
The Three Gorges Dam on the Yangtze River, China, is the world's largest hydroelectric power (HEP) scheme — a major attempt to manage energy sustainably in an emerging country.
Key facts:
Installed capacity of about 22,500 MW — the largest power station on Earth.
Benefits: huge low-carbon electricity supply, flood control on the Yangtze, and improved river navigation.
Costs: the reservoir flooded towns and farmland and displaced roughly 1.3 million people; it drowned habitats and heritage sites and traps sediment.
It shows the sustainability trade-off perfectly: clean, renewable power on a massive scale, but with real environmental and social costs.
Quick check
Three Gorges Dam
?Which statement about the Three Gorges Dam is a genuine disadvantage of the scheme?
Quick check
Cutting demand
?Which of these is an example of reducing energy demand (energy conservation), rather than increasing supply?