Collide, move apart, and slide Flashcards
Father of the plate tectonics theory
Alfred Wegener
The continental crust
- density?
- thickness?
- primary composition?
- 2.7 g/cm^3
- 35-70 km
- Granite
The brittle solid part of Earth.
Lithosphere
A low-density, light-colored, coarse-grained, felsic igneous rock.
Granite
A high-density, dark-colored, fine-grained, mafic, igneous rock.
Basalt
The oceanic crust
- density?
- thickness?
- primary rock composition?
- 3.0 g/cm^3
- 7-10 km
- basalt
When the internal driving force from Earth causes the surface to move, it results in _________________________________ such as earthquakes and volcanic activities.
different geologic phenomena
It is a ductile layer under the solid lithosphere.
Asthenosphere
It is primarily composed of rocks that are partly molten due to high temperature and pressure under the lithosphere.
Asthenosphere
The movement of each tectonic plate is _____ and _______________ to one another.
slow, constant relative
Each convection current is divided into ______ that move in the opposite direction.
cells
3 types of plate margins
- Convergent
- Divergent
- Transform
The plate boundaries where the plates move apart from each other, resulting in the production of a new seafloor.
Divergent plate boundaries
Plate margins are also known as ________________.
plate boundaries
Plate boundaries where the plate move toward each other.
Convergent plate boundaries
3 types of collisions of two plates
- oceanic-continental
- oceanic-oceanic
- continental-continental
The process at which the oceanic crust sinks down the continental crust and goes back to the mantle.
Subduction
These chains of volcanoes parallel to the subduction zone are commonly called?
continental volcanic arcs
Although in oceanic-oceanic convergence where both plates have the same average density, the one that subducts is usually the __________ plate.
older
A deep, narrow depression on the ocean seafloor caused by the collision and/or subduction of plates.
trench
The plates slide past horizontally to each other without destroying the lithospheric plate.
Transform plate boundary
Mountain ranges underwater results from __________________.
Diverging plates
Geologic activities in plate boundaries can be determined by the? (2)
- Type of plate boundary
- Type of crust found on each side of the boundary
The edges where two plates meet.
Plate boundaries
