Natural resources: food, water and energy
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교육자를 위해: Natural resources: food, water and energy(KS3 Geography, Human Geography)을(를) 위한 바로 쓸 수 있는 수업 슬라이드, 복습 노트 — 수업에 사용하거나, 학습자들이 실시간 게임으로 즐기는 인터랙티브 클래스 활동으로 진행하세요.
수업 노트
Types of resources
- A natural resource is anything from the environment that people use, such as water, soil, timber, fish, minerals and fossil fuels.
- Renewable resources are replaced naturally and will not run out if managed well — sunlight, wind, water, timber from managed forests.
- Non-renewable resources are finite and will run out — coal, oil, natural gas and metal ores.
- Food, water and energy are the three resources most essential to human wellbeing.
Uneven supply and demand
- Resources are unevenly spread: some places have plentiful rain, fertile soil or oil, others do not.
- Global demand is rising because of population growth and economic development — richer people eat more meat, use more water and consume more energy.
- Higher-income countries consume far more resources per person than lower-income countries.
- Where demand is greater than supply there is a deficit; where supply is greater there is a surplus.
Food
- Food security exists when everyone has reliable access to enough affordable, nutritious food.
- Food insecurity is caused by drought, floods, conflict, poverty, pests and diseases, and high food prices.
- Increasing food supply: irrigation, new high-yield crop varieties (the Green Revolution), fertilisers, and hydroponics (growing plants in nutrient-rich water).
- Food miles measure how far food travels from farm to plate; imported food adds transport emissions.
- Reducing food waste and eating local, seasonal food make food supply more sustainable.
Water
- Only a tiny fraction of the Earth's water is fresh water that is easy for people to use; most is salty seawater or frozen in ice.
- Water stress happens when demand for water exceeds the available supply, or poor quality limits its use.
- In the UK the north and west get the most rain, but most people live in the south and east — so water is transferred through pipes and rivers, for example from the Elan Valley in Wales to Birmingham.
- Ways to increase supply: dams and reservoirs, water transfer schemes, groundwater from wells, and desalination (removing salt from seawater — expensive and energy-hungry).
- Ways to reduce demand: water meters, fixing leaks, low-flush toilets, and recycling grey water.
Energy
- Fossil fuels — coal, oil and gas — formed from ancient plants and animals over millions of years; burning them releases carbon dioxide.
- Renewable energy: wind, solar, hydroelectric (HEP), tidal, wave, geothermal and biomass.
- Nuclear power produces very little carbon dioxide but uses non-renewable uranium and creates radioactive waste.
- The UK's energy mix has shifted from coal to gas, wind and other low-carbon sources; its last coal power station closed in 2024.
- Energy security means having reliable, affordable energy; relying on imports can be risky if supplies are disrupted.
Advantages and disadvantages of energy sources
- Wind: renewable and clean, but unreliable when the wind drops; some people object to the look and noise of turbines.
- Solar: renewable, works best in sunny places; produces nothing at night.
- HEP: reliable renewable power, but dams flood valleys and displace people and wildlife.
- Fossil fuels: reliable and on demand, but they release greenhouse gases and will run out.
- Fracking extracts gas from shale rock; it is controversial because of concerns about small earthquakes and water pollution.
Sustainable resource use
- Sustainable use means meeting today's needs without stopping future generations meeting theirs.
- Strategies: using renewable energy, insulating homes, energy-efficient appliances, public transport, reducing waste, recycling.
- Small-scale schemes, such as rainwater harvesting or solar lamps, can help communities in lower-income countries.
슬라이드
연습 문제
무료 미리 보기 — 48개 중 8개 문제. 가입하면 전부 볼 수 있어요.
1.What is a natural resource?
Easy- ASomething from the environment that people use
- BAnything made in a factory
- CA type of weather
- DA map symbol
2.Which of these is a non-renewable resource?
Easy- AWind
- BSunlight
- CTimber from a managed forest
- DCoal
3.Which of these is a renewable energy source?
Easy- AOil
- BCoal
- CSolar power
- DNatural gas
4.Why is global demand for resources rising?
Medium- AFewer countries are developing
- BPopulation growth and economic development
- CThe world's population is falling
- DPeople are using less energy
5.What is a resource deficit?
Easy- AWhen demand is greater than supply
- BWhen supply is greater than demand
- CWhen a resource is renewable
- DWhen a resource is exported
6.What is food security?
Easy- ALocking food in warehouses
- BA country growing only one crop
- CA ban on importing food
- DWhen everyone has reliable access to enough affordable, nutritious food
7.Which of these is a cause of food insecurity?
Medium- AHigh-yield seeds
- BReducing food waste
- CDrought causing crop failure
- DIrrigation of farmland
8.What was the Green Revolution?
Medium- AThe spread of vegetarian diets
- BThe use of high-yield crop varieties, fertilisers and irrigation to boost farm output
- CA political movement to plant trees
- DA switch to solar energy
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