Flashcards

JC Geography Plate tectonics flash cards pictures

Steven Morgan Geography Leaving Certificate Inglês 10 flashcards

Flashcards do conjunto (10)

1—Constructive Plates
Pull Apart
Creates new crust
Usually underwater
Mid Ocean Ridge
American/Eurasian plate
Magma cools & hardens
Basalt
2—Destructive Plates
Destroys crust
Plates collide/crash into each other
Ocean trench
Heavier plate pushed into mantle
Volcanic mountain ranges
3—Mid Atlantic ridge
Underwater mountain range
Constructive plates
American/Eurasian
Volcanic islands (Iceland)
16,000km long
Basalt rock
Taller than Mt Everest
4—Earth's Structure
Crust; outside 10-70km thick
Mantle; under crust, semi molten rock called magma
Core; nickel& iron, solid, over 5,000 degrees.
5—Plates collide/slip past each other
Release of energy (tremors)
(A)Focus; Point of contact
(C)Epicenter; On surface directly above focus.
(D)Fault line; Boundary between plates.
Aftershocks; small tremors after main quake.
6—Volcano
Plates separate
Cone; Shape of mountain
Crater; Lava escapes here
Vent; How magma gets to crater
Magma Reserve: Where magma is stored.
Lava: Magma on surface
7—Fold Mts
Destructive plates (collide).
Light plates buckle up.
Andes, Rockies, Himalayas
Indian & Eurasian plate
Tallest Mts in world
Alpine Fold most recent
Armorican Fold (Ireland)
8—Tsunami
Earthquake out at sea.
Large wave made by tremors.
Very destructive
Japan 2011
Eurasian/Pacific plates collide
Gets taller near shore
Travels over 800km per hour
9—Pangaea
Large landmass.
Theory of continental drift.
Plates moved by convection currents.
Very slow movement.
10—Seismograph
Machine used to MEASURE tremor strength.
A RICHTER SCALE is a descriptive scale used to describe its force.