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
Environmental Threats to Our Planet
Climate change through the Quaternary, and since 1000AD
- 3 things to know
- Component 02
Overview
When the Quaternary began, its swings between glacial and interglacial phases, the interglacial we live in now, why sea level fell in each ice age, the medieval warming, the Little Ice Age and modern warming in order, and how modern warming differs from earlier changes.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
What is meant by a glacial period?
Key term
What is meant by an interglacial?
Questions from this subtopic
Each one with the model answer underneath.
- 1
When did the Quaternary period begin?
Model answer
About 2.6 million years ago, and it runs through to the present day.
- 2
What is the overall pattern of global temperature through the Quaternary?
Model answer
Temperature has swung repeatedly between long cold glacial phases and shorter warm interglacial phases rather than staying steady.
- 3
What is meant by a glacial period?
Model answer
A cold phase, lasting roughly a hundred thousand years, when ice sheets and glaciers advanced far beyond their present limits.
- 4
What is meant by an interglacial?
Model answer
A warmer phase between two glacials, usually only ten to fifteen thousand years long, when the ice retreated.
- 5
Which kind of climate phase are we living in today?
Model answer
An interglacial, which began roughly twelve thousand years ago when the last ice advance ended.
- 6
Why did sea level fall during each ice age?
Model answer
So much water was locked up in growing ice sheets and glaciers that it never returned to the oceans.
Other ways to work this
The same content, four other ways.
What is inside Levo
Six ways to work the same material.
Every question in Environmental Threats to Our Planet, on a schedule.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
Or £46 a year, about £3.83 a month. Cancel anytime.