Continental Drift
This scientist proposed the theory of continental drift.
Alfred Wegener
This process occurs at mid-ocean ridges where new crust is formed.
Seafloor Spreading
Earth's plates float on top of which layer of the mantle?
Lithosphere
This boundary "divides" or moves apart.
Divergent
This is created when two continental plates with EQUAL density collide together.
This supercontinent existed over 200 million years ago and eventually broke apart into the continents we know today.
Pangea
________________ was the scientist who used sonar to map the seafloor and provide evidence for seafloor spreading.
Marie Tharp
This is the name of the process where old crust is recycled at subduction zones.
Subduction
What is the hand movement for a DIVERGENT boundary?
<---- --->
This is where the process of subduction happens. It is also the same place where old oceanic crust sinks back into the mantle to get recycled.
Deep-Ocean Trench
What are the three types of evidence was used to support the theory of continental drift.
Fossil, Landforms, Climate Change
This is the name of the underwater mountain range where seafloor spreading occurs.
Mid-Ocean Ridge
What is the process that occurs in the mantle that is thought to be the force behind plate tectonics and involves the heating and cooling of material?
Convection currents
This boundary "collides" or moves together.
Convergent
What is caused when two plates that are sliding past each other, get stuck and then jolt or move quickly?
Earthquake
This is the name of the current theory that explains the movement of the Earth's plates.
Plate Tectonics
Ocean's with many trenches will _________________.
a. grow/get bigger
b. shrink/get smaller
b. shrink/get smaller
Which is NOT caused or created by plate movement?
a. Earthquakes
b. Mountain Ranges
c. Rainfall
d. Island Arcs
c. Rainfall
What is the hand movement for a CONVERGENT boundary?
---> <---
True or False: Earth's crust is never destroyed.
True, it is recycled.
What are the names of the 3 fossils that Wegener gathered data on to help explain his theory of Continental Drift?
Glossopteris, Mesosaurus and Lystrosaurus
What are magnetic stripes?
When new ocean floor is created, magnetic materials inside the rock line up with Earth’s magnetic poles before the lava hardens into solid rock.
Which type of crust is MORE dense? (Hint: it will sink)
Oceanic Crust
This boundary "slides" or slips past one another.
Transform
A ________________ forms along plate boundaries and are breaks in the Earth's crust where rocks can slip past one another.