Raging Planet Flashcards
Periods of folding
Alpine,armorican,caledonia
What are the plates with land on top called
Continetal plate
Whats a plate with oceans on top
Oceanic plates
Whats the line were 2 plates meet
Boundary
The magma in the mantle is moved around in circular motion by
Convection currents
What are plates that collied also callsd
Destructive (or convergent) boundaries
Plates that slide past each other are
Passive boundaries
What do sliding plates cause
Earthquakes and fault lines
What is the crust broken into
Pieces called plates
The plates are constantly moving because of
Continental drift
How do volcanoes occur
magma occurs in the crust when 2 plates pull apart and magma spill through the gaps
The effects of volcanoes
Mid ocean ridges,volcanic islands,volcanic mountains
Whats the mid-Atlantic ridge
Underwater mountain range
Stages in a volcano
Active,dormant,extinct
Whats a active volvanoe
The volcano still erupts
Dormant volcano
Hasn’t erupted for a long time may erupt in future
Extinct volcano
The volcano has not erupted in ages and will not erupt again
Whats the pacific ring of fire
A path along the pacific ocean where active volcanoes and frequent earthquakes
What are earthquakes
Are sudden tremors or vibrations in earths crust
What is the point beneath the surface where earthquakes happen called
The focus
What is directly above the focus
Epicentre the tremors and vibrations are the strongest there
How do fold mountains form
Fold mountains form when 2 plates collide with each other
Fold mountains
The magma (formed from the heavier plays melting into the mantle) can move to the surface forming volcanoes
Example of fold mountains
The andes
Parts of volcano
Magma chamber,vent,crater,lava
Movement of the Earths lithospheric plates called
Tectonic movements
Convergent
Spread apart
Divergent
Slide past one another
