Natural Hazards Revision
Earthquakes and Volcanoes <ul><li>Types of Hazards </li></ul><ul><li>Plate Tectonics </li></ul><ul><ul><li>Earthquakes </l...
Plate Tectonics
Types of Boundaries
Where do Volcanoes occur
Where do earthquakes occur
Case Study –Earthquake, Kobe, Japan, MEDC <ul><li>Need to know </li></ul><ul><ul><li>When </li></ul></ul><ul><ul><li>Where...
Earthquake -Gujurat India, LEDC <ul><li>Need to know </li></ul><ul><ul><li>When </li></ul></ul><ul><ul><li>Where </li></ul...
Volcano – Mount Pinatubo, Philippines <ul><li>Need to know </li></ul><ul><ul><li>When </li></ul></ul><ul><ul><li>Where </l...
Questions <ul><li>What causes earthquakes and volcanic activity? </li></ul><ul><li>What are the main processes at work at ...
Natural Hazards - Flooding <ul><li>Causes of River Flooding </li></ul><ul><li>Case Studies of Flooding </li></ul><ul><ul><...
Flooding Causes <ul><li>Heavy Rain: The river cannot cope and this extra water causes the level of the water in the r...
LEDC Bangladesh or China <ul><li>Know your causes </li></ul><ul><ul><li>Human </li></ul></ul><ul><ul><ul><li>Eg Deforestat...
MEDC Mississippi (USA) & Rhine (Germany) <ul><li>Know your causes </li></ul><ul><ul><li>Human </li></ul></ul><ul><ul><li>P...
Drought <ul><li>Keyterms use p 40 revision guide to revise & define </li></ul><ul><ul><li>Drought </li></ul></ul><ul><ul><...
Droughts & Humans <ul><li>Droughts occur when a long period of abnormally dry weather leads to a severe water shortage. Ex...
What measures are taken in UK <ul><li>Reuse </li></ul><ul><li>Hosepipe bans </li></ul><ul><li>Cutting down on waste & leak...
Case Study – The Sahel, North Africa <ul><li>Location – You should know the general location and some of the countries </l...
Tropical Storms <ul><li>Revolves with winds over 200km/hr, heavy rain, high seas </li></ul><ul><li>hurricanes , typhoons ...
Why do they occur <ul><li>Hurricanes need a lot of heat to form, which is why they usually occur over tropical seas. It wo...
Effects <ul><li>Winds – Destruction of property & communications </li></ul><ul><li>Rains – Flooding </li></ul><ul><li>High...
Reducing the effects of tropical storms includes: <ul><li>Studying tropical storms once they form </li></ul><ul><li>Provi...
Case Study MEDC Hurricane Katrina Tropical Storm LEDC Bangladesh <ul><li>When </li></ul><ul><li>Where </li></ul><ul><li>E...
Compare & Contrast <ul><li>How do MEDCs cope and why </li></ul><ul><li>How do LEDCs cope and why </li></ul>
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Natural Hazards Revision Hobart High 2008

Published on: Mar 3, 2016
Published in: Technology      Education      
Source: www.slideshare.net


Transcripts - Natural Hazards Revision Hobart High 2008

  • 1. Natural Hazards Revision
  • 2. Earthquakes and Volcanoes <ul><li>Types of Hazards </li></ul><ul><li>Plate Tectonics </li></ul><ul><ul><li>Earthquakes </li></ul></ul><ul><ul><li>Volcanoes </li></ul></ul><ul><li>Tropical Storms </li></ul><ul><li>River Floods </li></ul><ul><li>Droughts </li></ul><ul><li>Global Warming </li></ul><ul><li>Ability to Cope – LEDC vs MEDC </li></ul>
  • 3. Plate Tectonics
  • 4. Types of Boundaries
  • 5. Where do Volcanoes occur
  • 6. Where do earthquakes occur
  • 7. Case Study –Earthquake, Kobe, Japan, MEDC <ul><li>Need to know </li></ul><ul><ul><li>When </li></ul></ul><ul><ul><li>Where </li></ul></ul><ul><ul><li>Why </li></ul></ul><ul><ul><li>Effects </li></ul></ul><ul><ul><ul><li>Primary </li></ul></ul></ul><ul><ul><ul><li>Secondary </li></ul></ul></ul><ul><ul><li>Aid </li></ul></ul>
  • 8. Earthquake -Gujurat India, LEDC <ul><li>Need to know </li></ul><ul><ul><li>When </li></ul></ul><ul><ul><li>Where </li></ul></ul><ul><ul><li>Why </li></ul></ul><ul><ul><li>Effects </li></ul></ul><ul><ul><ul><li>Primary </li></ul></ul></ul><ul><ul><ul><li>Secondary </li></ul></ul></ul><ul><ul><li>Aid </li></ul></ul>
  • 9. Volcano – Mount Pinatubo, Philippines <ul><li>Need to know </li></ul><ul><ul><li>When </li></ul></ul><ul><ul><li>Where </li></ul></ul><ul><ul><li>Why </li></ul></ul><ul><ul><li>Effects </li></ul></ul><ul><ul><ul><li>Primary </li></ul></ul></ul><ul><ul><ul><li>Secondary </li></ul></ul></ul><ul><ul><li>Aid </li></ul></ul>
  • 10. Questions <ul><li>What causes earthquakes and volcanic activity? </li></ul><ul><li>What are the main processes at work at constructive and destructive plate margins? </li></ul><ul><li>Describe how plate movements lead to the formation of fold mountains like the Himalayas </li></ul><ul><li>In what ways do conservative plate margins differ from other plate boundaries </li></ul>
  • 11. Natural Hazards - Flooding <ul><li>Causes of River Flooding </li></ul><ul><li>Case Studies of Flooding </li></ul><ul><ul><li>LEDC </li></ul></ul><ul><ul><li>MEDC </li></ul></ul><ul><ul><li>EU </li></ul></ul>
  • 12. Flooding Causes <ul><li>Heavy Rain: The river cannot cope and this extra water causes the level of the water in the river to rise and a flood to take place. WHY? </li></ul><ul><li>The following factors may encourage flooding: </li></ul><ul><ul><li>A steep-sided channel. </li></ul></ul><ul><ul><li>A lack of vegetation or woodland. </li></ul></ul><ul><ul><li>A drainage basin consisting of mainly impermeable rock. </li></ul></ul><ul><ul><li>A drainage basin in an urban area. </li></ul></ul>
  • 13. LEDC Bangladesh or China <ul><li>Know your causes </li></ul><ul><ul><li>Human </li></ul></ul><ul><ul><ul><li>Eg Deforestation </li></ul></ul></ul><ul><ul><li>Physical (Natural) </li></ul></ul><ul><ul><ul><li>Eg Heavy monsoon rain between April and September </li></ul></ul></ul><ul><li>Understand the Solutions </li></ul><ul><li>Know a specific event </li></ul>
  • 14. MEDC Mississippi (USA) & Rhine (Germany) <ul><li>Know your causes </li></ul><ul><ul><li>Human </li></ul></ul><ul><ul><li>Physical </li></ul></ul><ul><li>Understand the Solutions </li></ul><ul><li>Know a specific event </li></ul>
  • 15. Drought <ul><li>Keyterms use p 40 revision guide to revise & define </li></ul><ul><ul><li>Drought </li></ul></ul><ul><ul><li>Desertification </li></ul></ul><ul><ul><li>Soil Erosion </li></ul></ul><ul><ul><li>Deforestation </li></ul></ul>
  • 16. Droughts & Humans <ul><li>Droughts occur when a long period of abnormally dry weather leads to a severe water shortage. Extreme weather conditions are not the only cause of droughts, however - they are often caused by the activity of man as well. Human activities which can help trigger droughts include: </li></ul><ul><ul><li>Constructing a dam on a large river may help provide electricity and water to irrigate farmland near the reservoir. But it may also cause drought downstream by severely reducing the flow of water. </li></ul></ul><ul><ul><li>Widespread cutting down of trees for fuel reduces the soil's ability to hold water, - drying out the ground, triggering desertification , and leading to drought. </li></ul></ul>
  • 17. What measures are taken in UK <ul><li>Reuse </li></ul><ul><li>Hosepipe bans </li></ul><ul><li>Cutting down on waste & leakage </li></ul><ul><li>Collect your own </li></ul><ul><li>Effects in UK </li></ul><ul><li>Water Quality Problems </li></ul><ul><li>Less irrigation </li></ul><ul><li>Cracking & subsidence </li></ul><ul><li>Rationing </li></ul>
  • 18. Case Study – The Sahel, North Africa <ul><li>Location – You should know the general location and some of the countries </li></ul><ul><li>Explain the significance of the ITCZ </li></ul><ul><li>How have humans made it worse </li></ul><ul><li>What are the effects </li></ul><ul><li>How do people cope </li></ul>
  • 19. Tropical Storms <ul><li>Revolves with winds over 200km/hr, heavy rain, high seas </li></ul><ul><li>hurricanes , typhoons or tropical cyclones </li></ul><ul><li>Where, between 5 & 20 degrees latitude of the equator </li></ul>
  • 20. Why do they occur <ul><li>Hurricanes need a lot of heat to form, which is why they usually occur over tropical seas. It works like this: </li></ul><ul><li>Rising warm air rises fast (by warm seas over 27 degrees), causing towering clouds, heavy rainfall, and intense low pressure. </li></ul><ul><li>The low pressure sucks in air, causing very strong winds which spiral - clockwise in the northern hemisphere (anti in the Southern) - around the centre of the low, at speeds of around 120 km/h (75 mph). </li></ul><ul><li>Seen from above hurricanes are huge circular bodies of thick cloud around 450 km (300miles) wide. The cloud brings heavy rain, thunder and lightning. </li></ul><ul><li>In the centre is the eye of the hurricane , about 45 km across (30miles) across. Often there will be no cloud in the eye. Seen from below it will seem calmer, with a circle of blue sky above. The eye is formed because this is the only part of the hurricane where air is sinking. </li></ul><ul><li>In the northern hemisphere, the prevailing easterly tropical winds tend to steer hurricanes toward land - although their course is unpredictable. As they move inshore their power gradually reduces, because their energy comes from sucking up moist sea air </li></ul>
  • 21. Effects <ul><li>Winds – Destruction of property & communications </li></ul><ul><li>Rains – Flooding </li></ul><ul><li>High Seas – Storm surges </li></ul>
  • 22. Reducing the effects of tropical storms includes: <ul><li>Studying tropical storms once they form </li></ul><ul><li>Providing an early warning system </li></ul><ul><li>Long-term planning in areas prone to tropical storms </li></ul>
  • 23. Case Study MEDC Hurricane Katrina Tropical Storm LEDC Bangladesh <ul><li>When </li></ul><ul><li>Where </li></ul><ul><li>Effects </li></ul>
  • 24. Compare & Contrast <ul><li>How do MEDCs cope and why </li></ul><ul><li>How do LEDCs cope and why </li></ul>