Mock Revision Flashcards
(16 cards)
What occurs in the earths structure that influences plate tectonics?
Convection currents
What are the 5 stages of convection currents ?
- The Earths core heats up the magma
- As the magma is heated it gets lighter
- Near the surface it cools, gets heavier and the sinks
- The swirling movement keeps the plates afloat and they are shoved, pulled and pushed
What PDA stand for?
Pattern
Data
Anomaly or analysis
Which plate is mostly less than 200million years old?
Oceanic
Which plate is denser and can sink?
Oceanic
Which plate can be renewed and destroyed?
Oceanic
How old are the continental plates
Mostly over 1500million years
Which way do the plates move in Constructive plate boundaries?
And what does this form?
Apart from each other
Earthquake (gentle)
Volcano
What type of crust do constructive plate boundaries occur on?
Give a location eg
Oceanic or Continental
Iceland
Which way do the plates move at Conservative plate margins?
What do they form
⬆️⬇️or⬆️⬆️
Earthquake
Crusts involved in a conservative plate margin? Give a location eg
Oceanic and continental
San Francisco or San Andreas Fault California
What two types of Destructive plate margins are there?
Collision
Subduction
Which was do the directions of the plates move at a Destructive Collision plate boundary ?what does this form?
↘️↖️
Fold mountains
What type of crust is involved in destructive collision plate margins?
Give location example
Both continental
Eg-Alps or Himalayas
What are the direction do the plates move in a destructive subduction plate margin? What does this form
Location eg
The oceanic is subducted by the continental crust, this forms Earthquakes and Volcanoes
Japan
What is a Hotspot caused by?
A mantle Plume where the oceanic crust is very thin
