Question | Answer |
According to Wegener, how many landmasses did all continents once form? | One |
Process of forming new oceanic lithosphere as magma rises to the surface | Sea-floor spreading |
Areas where sea-floor spreading takes place | Mid-ocean ridges |
Process that happens when Earth's magnetic poles change place | Magnetic Reversal |
Theory that explains how continents reached their current locations | Continental Drift |
Place where tectonic plates touch is known as the | Tectonic Boundary |
Boundary formed when tectonic plates collide | Convergent Boundary |
Boundary formed when tectonic plates separate | Divergent Boundary |
Boundary formed when tectonic plates slide past horizontally. | Transform Boundary |
When rock is hearted, it becomes less dense and tends to | rise |
Plate motion due to higher densities | Slab Pull |
Plate motion due to gravity | Ridge Push |
Plate motion due to the heating and cooling of rocks | Convection |
How fast do tectonic plates move? | Centimeters per year |
When stress squeezed an object it is called | Compression |
When stress stretches an object it is called | Tension |
The process by which the shape of a rock changes because of stress | Deformation |
The bending of rock layers due to stress is known as | Folding |
A fold where both ends of the rock layer are horizontal | Monocline |
A downward, troughlike fold in a rock layer | Syncline |
An upward arching fold in a rock layer | Anticline |
When tension pulls rocks apart, it creates a | Normal fault |
When compression pushes rocks together it creates a | Reverse Fault |
When opposing forces cause rock ot break and move horizontally | Strike-slip fault |
When tectonic plates collide, folds and faults can become | Mountain ranges |
What kind of mountain range is formed when rock layers are squeezed and forced upward? | Folded mountains |
What kind of mountain range is formed when tension causes large blocks of crust to drop down? | Fault-block mountians |
What kind of mountain is formed when magma rises to the surface and erupts? | Volcanic Mountians |
The rising of Earth's crust to higher elevations is called | Uplift |
The sinking of regions of the Earth's crust to lower elevation is called | Subsidence |
When the Earth's crust slowly springs back to its original elevation, it is called | Rebound |
What did Wegener call the single large landmass? | Pangaea |
Underwater mountain chains running through EArth's ocean basins are called | Mid-ocean ridges |
In a reverse fault, where does the hanging wall move relative to the footwall? | Downward |
In a normal fault, where does the hanging wall move relative to the footwall? | Upward |
Used to measure the movement of tectonic plates | Global positioning system |
Harden to form new rock at mid-ocean ridges | Magma |
Used as evidence for continental drift | Fossils |
Used as evidence for sea-floor spreading | Magnetic reversal |