Give Me Space...
Plates that slide past one another are called _______________.
Transform or conservative
In what year was the theory of continental drift proposed?
1915
Two plates that crash into one another are called ___________________.
convergent
These oceanic features cut deep into the Hadalpelagic zone of the ocean.
trenches
Hot air ________, due to the increased molecular energy and decreased density.
rises
Plates that slide past one another cause the earth to break and crumble, forming ________________.
Earthquakes; fault lines
Who proposed the theory of continental drift?
Alfred Wegener
At a convergent boundary, the more dense plate sinks below the less dense plate, in a process called ________________.
Subduction
The deepest point in our oceans is a trench named ________________.
Challenger's Deep
____________________ are the circular movements found in the mantle. They are responsible for moving the plates.
Convection currents
There are ___ major plates on the Earth.
14
What evidence was used to disprove the continental drift theory?
geologic features promoting crust cut into pieces; glacier movement; fossils (parsimony)
Convergent plate boundaries involving continental crust may form what geologic features?
mountain ranges, volcanic mountains
When two plates pull away from one another, it could result in _________________, where magma from the mantle rises up and forms new land on either side of the boundary.
sea floor spreading
The upper third of the mantle, where all the motion takes place.
asthenosphere
Plates are made up of broken _____________, which consists of most of the crust.
lithosphere
There were scientists that opposed the continental drift theory. What did they believe caused the Earth's features?
Heating and cooling caused expansion and contraction of the earth
______________ are divots in the crust after two oceanic plates collide, and the more dense plate sinks.
Trenches
East Africa and Iceland are home to the world's only ______________, key geologic features formed because of divergent boundaries.
rift valleys
The center layer of the Earth, split up into two parts, responsible for the heating of the mantle.
Core (Inner and Outer)
pressure of water pushing the molecules closer together
What were the opposer to the Continental Drift theory called?
Anti-Mobilists
Mt. St. Helen's is an example of what specific kind of boundary?
Why do rift valleys form with continental plates, and mid ocean ridges form with oceanic plates?
oceanic plates are thinner, which allows the magma to rise all the way to the surface.
Underwater volcanoes are formed from which plate interactions?
Convergent- continental/oceanic and oceanic/oceanic