Plate Boundaries Flashcards
What are the three plate boundaries?
Constructive
Destructive
Conservative
What happens at a constructive plate boundary?
Two plates pulled apart
What features can be found at a constructive plate boundary? (5)
-new land
-volcanoes
-mid ocean ridges
-volcanic islands
-earthquakes
How is new land formed at a constructive plate boundary?
Two plates are pulled apart by convection currents. Molten magma comes to the surface through a fissure. This creates new land
What happens at a destructive plate boundary?
Two plates collide
What features can be found at a destructive plate boundary?
-fold mountains
-volcanoes
-earthquakes
Explain how fold mountains form at destructive plate boundaries
Convection currents cause two plates to collide. The heavier plate sinks into the mantle and is destroyed. The lighter plate buckles upwards, creating fold mountains an sometimes volcanoes
What happens at conservative plate boundary?
Plates move side by side
What features can be found a conservative plate boundary?
Earthquakes
Describe how an earthquake occurs
Two plates move side by side. They can move in opposite directions or in the same direction but at different speeds. Sometimes the plates get stuck. Eventually they slip forward the sudden energy released creates an earthquake