Restless Earth
- Created by: Olliejh98
- Created on: 25-01-15 15:26
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- The Restless Earth
- The Earths Crusts
- Continental
- Older (1500 million yrs old), Thicker (30km), Granite, Can't be renewed/ destroyed
- Oceanic
- Younger (under 200 million yrs old), Thinner (5-10km) , Basalt, Can be renewed/ destroyed
- Continental
- Plate boundaries
- Destructive
- Collision
- Africa/Eurasia (Cont+Cont.)
- Subduction
- South America/Nazca (Oceanic+Cont.)
- Collision
- Constructive
- Plates diverge
- Pacific/Nazca
- Plates diverge
- Conservative
- Plates slide alongside at different speeds
- Destructive
- Landforms/ Occurences
- Destructive
- Subduction
- Ocean trench/ Composite Volcanoes/ Earthquakes
- Collision
- Fold mountains
- Subduction
- Constructive
- Mid-ocean ridge/ Shield Volcano/ mild Eathquakes
- Conservative
- Earthquakes
- Destructive
- Volcanoes
- Composite
- Infrequent but violent eruptions
- Steep slopes, narrow base, crater and secondary vents
- Viscous lava/ pyroclastic flow 400 degrees
- Steep slopes, narrow base, crater and secondary vents
- Infrequent but violent eruptions
- Shield
- Frequent non violent eruptions
- Wide base, gentle slopes, crater
- Thin/ runny lava
- Wide base, gentle slopes, crater
- Frequent non violent eruptions
- Supervolcano
- Dormant with potentially catastrophic consequences
- Huge caldera (depression in land) vastly bigger than standard volcanoes
- Emit at least 1000km cubed of material, gas and ash erupt from cracks in the surface
- Huge caldera (depression in land) vastly bigger than standard volcanoes
- Dormant with potentially catastrophic consequences
- Composite
- Earthquakes
- Monitoring
- Seismogram
- Features
- Focus- point of origin
- Epicentre- directly above on surface
- Seismic waves- radiate out from focus
- Once the surface is reached: Primary-longitudal Secondary- latitudal
- P.P.P
- Preparation
- Hospitals
- Education/ Drills
- Protection
- Interlocking steel frame
- Computer controlled weights on roof
- Foundations and rubber shock absorbers
- Prediction
- Animal behaviour
- Foreshocks (not long enough to evacuate)
- Technology
- Preparation
- Monitoring
- Tsunamis
- Triggered by Earthquakes
- Primary effect- shifting of crust
- Secondary effect- displacement of water
- Crests initially about 220km apart, when land is reached wavelength shortens and height increases
- The wave originally travelling at about 800kph slows down as it reaches shallow water
- Crests initially about 220km apart, when land is reached wavelength shortens and height increases
- Secondary effect- displacement of water
- Primary effect- shifting of crust
- Triggered by Earthquakes
- The Earths Crusts
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