Upgrade to remove ads
Only $2.99/month

Chapter 4 Lesson 2 -- Shaping Earth's Surface

Terms in this set (12)

MAGNITUDE
The amount of energy released during an earthquake.Ranges from less than 1 to 9.9The higher the number the stronger the earthquake.
EARTHQUAKE
Is the vibrations caused by the rupture and sudden movementof rocks along a break or a crack in Earth's crust.
FAULT
Is a crack or a fracture in Earth's crust where movement occurs.
TRANSFORM BOUNDARY
The crust moves horizontally past each other.



Features that cross the fault such as streams
are shifted.
DIVERGENT BOUNDARY
In oceans these boundaries form mid-ocean
ridges.



On land these boundaries form valleys.
CONVERGENT BOUNDARY SUBDUCTION
Subduction zone (one plate goes
under the other).



Volcanoes form.
CONVERGENT BOUNDARY NO SUBDUCTION
When neither plate subducts the plates
become crumpled and deformed.



This results in the formation of tall mountains.
VOLCANOES
Are vents in Earth's crust
through which molten
(melted) rock flows.
MAGMA
Molten (melted) rock stored beneath
Earth's surface.
LAVA
Is magma that erupts onto Earth's
surface.
ERUPTIONS
1- Slowly and calm, lava flows over the
surface.



2- Violent ash and lava bombs sent into the
atmosphere.
MID OCEAN RIDGE
Long, narrow mountains formed
by magma at divergent
boundaries.



New crust forms



here
THIS SET IS OFTEN IN FOLDERS WITH...