Physical systems and the environment revision

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Physical systems and the environment revision

  1. 1. Physical Systems and the environment Revision Wednesday 22 nd April 2004
  2. 2. Sub Topics <ul><li>Geomorphic Processes and Landforms </li></ul><ul><li>Atmospheric processes and Climate </li></ul><ul><li>Ecosystems (Links between climate, soils, vegetation and human activity) </li></ul>
  3. 3. Key Questions <ul><li>What are the landforms that make up a selected landscape? </li></ul><ul><li>What physical processes are operating on the selected landscape? </li></ul><ul><li>What evidence is there of how landforms are influenced by geology and past and present processes? </li></ul>
  4. 4. Key Questions continued <ul><li>How are the landforms being influenced by human activity? </li></ul><ul><li>How do weather conditions reflect processes in the atmosphere at a local scale? </li></ul><ul><li>What influences the pattern of climate of the British Isles? </li></ul>
  5. 5. Key Questions continued <ul><li>How does the global atmospheric system affect the climate in different places? </li></ul><ul><li>Is the climate changing? </li></ul><ul><li>How can system’s ideas help the study of river basins, water in the atmosphere and habitats including their soil and vegetation? </li></ul>
  6. 6. 1.What are the landforms that make up a selected landscape? <ul><li>Knowledge of some selected landscapes which show different geology, geomorphology such as the following </li></ul>
  7. 7. Cornish coast
  8. 8. Ben Nevis
  9. 9. Eastern England
  10. 10. Seven Sisters
  11. 11. Crag Lough
  12. 12. Snowdon
  13. 13. Holford Combe – Case Study
  14. 14. Holford Combe <ul><li>Water Cycle </li></ul>A closed system
  15. 15. Holford Combe <ul><li>Water Cycle – an open system </li></ul>
  16. 16. Holford Combe <ul><li>Flood Hydrographs </li></ul>Think about the uses of a graph like this in prediction of floods and how man can use this to his advantage - management
  17. 17. Hydrographs <ul><li>Discharge </li></ul><ul><li>Max rainfall </li></ul><ul><li>Peak Discharge </li></ul><ul><li>Base Flow </li></ul><ul><li>Lag Time </li></ul><ul><li>Falling Limb </li></ul><ul><li>Rising Limb </li></ul>Animation of Hydrograph (http://www.bbc.co.uk/schools/gcsebitesize/geography/water/stormhydrographsrev2.shtml) <ul><li>Rock type </li></ul><ul><li>Soil </li></ul><ul><li>Relief </li></ul><ul><li>Vegetation </li></ul><ul><li>Land Use </li></ul><ul><li>Management </li></ul>
  18. 18. Holford Combe <ul><li>The river itself! (Upper, middle and lower course) </li></ul><ul><li>Source </li></ul><ul><li>Erosion </li></ul><ul><li>Transport </li></ul><ul><li>Deposition </li></ul><ul><li>Mouth </li></ul>Processes Abrasion HA Attrition Corrosion Energy – how is this used Where does a river have most of its energy?
  19. 19. Hydrological Cycle and Drainage Basin <ul><li>A closed system </li></ul>Inputs Stores Outputs Rain Precipitation Interception Surface storage Soil water groundwater Streamflow Transpiration Evaporation
  20. 20. The Hydrological cycle
  21. 21. Rivers Case Study (Holford Combe) <ul><li>Landforms </li></ul><ul><li>Erosional Process </li></ul><ul><li>Depositional Process </li></ul><ul><li>Transportation </li></ul><ul><li>Upper, middle and lower course profile and features </li></ul><ul><li>Management of AONB, SSSI’s and National Parks </li></ul>
  22. 22. Holford Combe <ul><li>A river meander </li></ul>High Energy Low energy Deposition Erosion
  23. 23. 2. What physical processes are operating on the selected landscape? <ul><li>Physical weathering </li></ul><ul><li>Biological Weathering </li></ul><ul><li>Chemical Weathering </li></ul>Freeze Thaw Exfoliation Wetting and drying Plants and animals Rainwater
  24. 24. 3. What evidence is there of how landforms are influenced by geology and past and present processes? <ul><li>Dependant upon climate mainly as climate controls rainfall rates, plant and animal life and temperature – all of which form the three physical types of weathering seen on previous page. We know past climates have been different and therefore some landscapes we see today are clearly formed when the climate was different. </li></ul>
  25. 25. 5. How do weather conditions reflect processes in the atmosphere at a local scale? <ul><li>Altitude, exposure/shelter, water, buildings on concrete/tarmac, aspect, coasts and vegetation – eg </li></ul><ul><li>Urban microclimates </li></ul><ul><li>Coastal Microclimates </li></ul><ul><li>Mountain Microclimates </li></ul><ul><li>Valley Microclimates </li></ul>
  26. 26. 6. What influences the pattern of climate of the British Isles? <ul><li>Seasonality (http://www.crh.noaa.gov/fsd/images/seasons.jpg) </li></ul><ul><li>Oceans – (http://www.amnh.org/exhibitions/permanent/ocean/images/01_dioramas/features/01_coralreef/gulf.jpg) theGulf stream another link (http://www.learn.co.uk/default.asp?WCI=Unit&WCU=18290) </li></ul><ul><li>Altitude </li></ul><ul><li>Prevailing Winds </li></ul><ul><li>Types of rainfall (http://www.learn.co.uk/default.asp?WCI=SubUnit&WCU=18292) </li></ul><ul><li>Passage of a depression across the UK </li></ul>
  27. 27. 7. How does the global atmospheric system affect the climate in different places? <ul><li>Diagram of global circulation (http://daac.gsfc.nasa.gov/DAAC_DOCS/geomorphology/GEO_8/GEO_CHAPTER_8.HTML) </li></ul><ul><li>Ocean currents (http://www.azer.com/aiweb/categories/magazine/82_folder/82_photos/82_562_pacific_ocean.jpg) relief, land and sea and latitude </li></ul><ul><li>Dry and wet places </li></ul><ul><li>Warm and cold places </li></ul><ul><li>Seasons (http://www.crh.noaa.gov/fsd/images/seasons.jpg) </li></ul><ul><li>Case Study Japan, Bangladesh, UK, Brazil </li></ul>
  28. 28. 8. Is the climate changing? <ul><li>How? - causes </li></ul><ul><li>What Evidence? Rising global temperatures – increasing storms – changing ocean currents and ice sheet depletion. </li></ul><ul><li>Consequences – UK, World </li></ul><ul><li>How can we adapt? </li></ul>
  29. 29. 9. How can system’s ideas help the study of river basins, water in the atmosphere and habitats including their soil and vegetation? A closed system – planet earth An open system – a river River Groundwater lake Rain Outputs Stores Inputs
  30. 30. Recommended Weblinks for Revision <ul><li>BBC Bitesize </li></ul><ul><li>Cities </li></ul><ul><li>Coasts </li></ul><ul><li>Economic Activity </li></ul><ul><li>Ecosystems </li></ul><ul><li>Population and Development </li></ul><ul><li>Tectonics </li></ul><ul><li>Water and Rivers </li></ul><ul><li>Weather and Climate </li></ul><ul><li>Exam Skills </li></ul><ul><li>Revision Checklist </li></ul><ul><li>Learn from the Guardian </li></ul><ul><li>This page has covers many geographical topics but is not specific to your syllabus. However, it is well worth looking at especially for good summaries on various case studies. </li></ul>Internet Geography Another good general site with other good geographical links on.

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