Geography revision Flashcards
What would make a place dangerous to live in?
-Volcanoes
-Earthquakes
-Tectonic boundaries
Extreme weather
-Crime
-Political unrest
-wild life
Why do people live in dangerous areas?
People live in dangerous areas because:
-Of cheap housing
-Not being able to afford to move
-Family get to live together.
What’s a continental plate?
A continental plate is a plate that’s found under continents.
Whats an oceanic plate?
An oceanic plate is a plate found under the oceans.
What’s a ridge slab & push pull?
A ridge slab & push pull is where at constructive margins, ocean rides from above the ocean floor. As the magma rises, it cools, adding to the tectonic plates.This is the ridge pull. At the destructive margins, the heavier plate sinks due to gravity.
What’s a shield volcano?
A shield volcano is a volcano with gentle slopes. They form from runny lava which spreads far away from its source.
What’s a composite volcano?
A composite volcano is a tall volcano with steep sides and a symmetrical cone shape.
What are geological hazards?
Geological hazards are caused by land and tectonic processes. Examples of geological hazards include volcanoes,earthquakes,landslides and avalanches.
What are meteorological hazards?
Meteorological hazards are hazards caused by weather and climate. Examples of meteorological hazards include tropical storms, other extreme weather including heatwaves and cold spells, and climate change.
what are the 3 factors that affect a hazard risk?
The 3 factors that affect a hazard risk are:
-Vulnerability
-Capacity to cope
-Nature of natural hazards.
What’s the focus of an earthquake?
The focus of an earthquake is the point in the earth where the earthquake starts.
Shallow focus earthquakes?
shallow focus earthquakes are caused by tectonic plates moving at or near the surface. They have a focus of of between 0km -70km below the earth’s surface.
What are deep focus earthquakes?
Deep focus earthquakes are caused by the crust that has previously been subducted into the mantle moving towards the centre of the earth, heating up or decomposing. They have a focus of between 70km and 700km below the earth’s surface.
Why do deep focus earthquakes do less damage?
deep focus earthquakes do less damage because they are far away from the surface meaning that they have to travel through more rock, which reduces their power and their amount of shaking when they reach the surface.
