Geo Plate Tech Flashcards
What is a Plate Boundary
The meeting of two tectonic plates
What is an Active Volcano
A volcano which is likely to erupt or has erupted
What is MEDC
More Economically Developed Country
What’s it called when Plate Boundaries move TOWARDS each other
Convergent
What’s it called when Plate Boundaries move APART from each other
Divergent
Name the 3 Tectonic Plates
Divergent
Convergent
Transformative
What causes a volcano?
Plate boundary movement
Convection current in mantle
Name scale to measure earthquake
Richter
Name 4 types of Volcano
Domes
Cinder Cones
Shield
Stratovolcanoes
Whats another name of a transformative boundary
Conservative
Whats another name of a CONVERGENT boundary
Destructive
Collision
Whats another name of a DIVERGENT boundary
Constructive (a new crust is created)
What happens at a convergent boundary?
Plates collide
Sometimes subduct (eg Oceanic)
Build up of Magma, Magma rises and lava solidifies
How does rock type affect an earthquake
- How fast they lose energy
- For instance, very solid granites will transmit energy better than the rocks and rubbble
How do fold mountains occur?
- Fold mountains are created when tectonic plates are pushed together (convergent plate boundaries)
- At these colliding, compressing boundaries, rocks and debris are pushed and folded into hills, mountains, and entire mountain ranges.
Decscribe Composite or StratoVolcano
Volcano
- Convergent Plate
- Viscous (sticky) lava
- Steep sides as the lava doesn’t flow very far before it solidifies.
- Layers of ash and lava.
- The name stratovolcanoes referes to Strato means layers.
- Violent eruptions.
- Longer periods between eruptions.
Describe Shield Volcanoes
- On divergent or Constructive plate boundaries
- Basic lava, very runny
- Gentle sides as the lava flows for long distances before it solidifies
- No layers, as the volcano just consists of lava
- Less violent eruptions
- Shorter periods between eruptions
How is earthquake damage linked by depth
- The depth of an earthquake significantly influences its impact on the surface
- Shallower quakes generally causing more damage.
- The depth of an earthquake focal depth is a critical factor in determining the level of destruction it can cause on the Earth’s surface.
What 5 factors impacts the damage of an earthquake?
- Intensity
- Duration of the shaking
- Rock Type
- Building type
- Population density
How is earthquake damage linked to population density
- High population density areas are more vulnerable to damage
- There are more buildings/ structures that can be impacted.
- Higher likelihood of building collapse
- In poorer areas buildings may not be earthquake proof
In the earth structure where do the tetconic plates sit?
The lithosphere.
Why would people live near a volcano
- Fertile Soil
- Geothermal Power
- Resources (Sulphur)
- Tourism
- Cannot afford to move
