Name of the plate boundary when two continental plates are colliding.
Convergent boundary
100
What land features are formed at a transform boundary? (name two!)
Faults (cracks) and earthquakes.
100
All continents once were connected as a giant super-continent called
Pangea
100
Approximately how fast do the tectonic plates move?
A few centimeters a year.
100
When plates are stuck and building up pressure they have __________ energy but while moving they have mainly __________ energy.
potential (stored) energy
kinetic (moving) energy
200
What is the boundary called when two tectonic plates are moving away from each other?
Divergent boundary
200
Where are folded mountains formed?
At convergent boundaries where a continental plate converges with another continental plate.
200
Similiar rocks with the same ages have been found on different continents, what two theories does this support?
Continental drift and plate tectonics
200
The cycle of warm, less dense matter rising and cool, more dense matter sinking is called a
convection current
200
What causes objects to increase speed, slow down, turn or any other type of acceleration?
Unbalanced forces cause objects to accelerate.
300
At a convergent boundary, is earth's crust being destroyed or is new crust forming from magma rising?
Crust is being destroyed - either pushed up at cont-cont boundaries or being pushed down into the mantle at convergent-subduction boundaries.
300
What are two land features that form at a subduction zone?
trenchs can form AND so can volcanic island/arcs (also earthquakes)
300
What does it mean that the continents seem to fit together like a puzzle?
Their coastlines match up as if they were a giant super-continent along time ago.
300
What earth layer makes up the tectonic plates?
The lithosphere (upper mantle and crust)
300
Name all the types of plate boundaries that cause earthquakes.
Transform
divergent
subduction
convergent
400
What is the name of the boundary when an oceanic tectonic plate is pushed down into the upper mantle?
convergent- subduction
400
The San Andreas Fault in California is a land feature formed by what type of boundary?
Transform
400
Explain the difference between "continental drift" and "plate tectonics".
Both are theories. Continental drift was the first idea - that the continents floated on water and moved. The current idea is called "plate tectonics" which says the entire lithosphere is broken into chunks that move.
400
The flowing rock layer that the tectonic plates move on is called the
asthenosphere
400
What formed the Himalayan mountains?
A continental tectonic plate and another continental plate converging pushing up earth's crust.
500
When plates slide past each other, this boundary is known as a
Transform boundary
500
What are THREE land features that can form at a divergent boundary?
Oceanic ridges
Rift valleys
faults
earthquakes
500
Double your points because this is NOT a theory question.... Explain what "oceanic ridges" and what "rift zones" are and how they form:
Oceanic ridges are underwater mountains/volcanoes.
Rifts are large valleys that form on land as the crust is pulled apart and thins.
Both form by the crust separating at a divergent boundary.
500
What land features can form at mid-ocean ridges?
volcanoes
500
What is the "ring of fire" and what caused it?
It is a chain of volcanoes in the pacific ocean caused by subduction of the tectonic plates.