Key term
OCR GCSE Geography A J383
Ecosystems of the Planet
Topic overviewAbiotic and biotic components, and how ecosystems interactThe world’s biomes: where they are and what they are likeWhere the tropical rainforests are, and what they are likeWhere the coral reefs are, and what they are likeRainforest processes and nutrient cyclingTwo threatened ecosystems: a rainforest and a coral reef
Environmental Threats to Our Planet
Topic overviewClimate change through the Quaternary, and since 1000ADThe evidence for climate changeNatural causes of climate change, and the enhanced greenhouse effectThe consequences of climate changeThe world’s climatic regions and global atmospheric circulationHow global circulation produces extreme weatherTropical storms: causes, distribution and frequencyA drought caused by El Niño or La Niña
Fieldwork Skills
Geographical Skills
Topic overviewConstructing maps, and reading cross-sections and transectsCoordinates, scale, distance and reading information from a mapGradient, contours, spot heights and GISChoosing, constructing and presenting graphs and chartsReading and interpreting the main graph and chart typesNumber, area, scale and the relationships between unitsProportion and ratio, and measures of central tendency and spreadPercentages and percentiles, and designing data collection sheetsReading tables, and describing relationships in bivariate dataTrend lines and lines of best fitPredicting from data, and spotting weak statistical presentationDrawing and justifying conclusions from dataInterpreting images and written sources, and recognising biasJudging the limits of maps, graphs, statistics and images
Landscapes of the UK
People of the Planet
Topic overviewDefining and measuring developmentThe global pattern of development: ACs, EDCs and LIDCsWhy development is uneven, and the role of aidA developing or emerging country: its context and economyRostow’s model and the country’s path of developmentCities, megacities and world citiesWhy urban growth rates differ around the worldRapid urbanisation in poorer countries: causes and effectsA major city in a poorer or emerging country
People of the UK
Topic overviewThe UK’s trade, media and cultural links with the worldThe UK’s geographical diversity and its inequalitiesUneven development within the UK, and the effects of economic growthHow the UK’s population structure has changed since 1900Immigration into the UK in the twenty-first centuryUrban trends in the UK and their effectsA major UK city: its people, challenges and ways of life
UK Environmental Challenges
Topic overviewAir masses, the North Atlantic Drift and the UK’s extreme weatherA UK flood event: causes, effects and responsesHow people use, modify and change UK ecosystemsThe UK’s renewable and non-renewable energy sourcesChanging UK energy supply and demand, and sustainable useRenewables in the UK, and the future of fossil fuelsWhat shapes the UK’s energy choices
UK Environmental Challenges
The UK’s renewable and non-renewable energy sources
- 3 things to know
- Component 01
Overview
What makes a source renewable or non-renewable, the fuels Britain relies on, its renewable options, why nuclear and biomass are classed as they are, the biggest shares of electricity, and why Britain imports energy.
What you need to know
Answer each one before you reveal it.
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Key term
Which non-renewable fuels does Britain rely on?
Key term
Which renewable sources are available to Britain?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What makes an energy source renewable?
Model answer
It draws on a natural flow that is replenished as fast as it is used, so supplies are not exhausted.
- 2
What makes an energy source non-renewable?
Model answer
It draws on a finite store laid down over geological time, so once it has been used it cannot be replaced within a human lifetime.
- 3
Which non-renewable fuels does Britain rely on?
Model answer
Coal, oil and natural gas, together with the uranium burned in nuclear reactors.
- 4
Which renewable sources are available to Britain?
Model answer
Wind, solar, hydroelectric, tidal and wave power, along with biomass and geothermal heat.
- 5
Why is nuclear power classed as non-renewable when it burns no fossil fuel?
Model answer
Because it depends on uranium, a mined ore that exists in limited quantities.
- 6
Is biomass renewable?
Model answer
Yes, because the wood or crops burned can be regrown, although burning them still releases carbon dioxide.
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