Plate Tectonics
Plate Boundaries
What is the supercontinent known as?
Pangea
What is the inner and outer core made of?
Iron and Nickel
Where are the oldest fossils found?
On the bottom
What happens at a divergent boundary?
Two plates moving away from each other
What causes/drives Earth's plate movement?
Convection Currents
What type of plate boundary is the Mid-Ocean Ridge (It is separating.)?
Divergent
Which layer of the Earth is the only liquid layer?
Outer Core
Where are the youngest fossils found?
On the top
What type of boundary is formed when plates slide past each other?
Transform
What feature forms at convergent boundaries?
Mountain Ranges/ Volcanoes and Trenches
New oceanic crust forms as a result of what?
Sea Floor Spreading
In which Earth layer is most convection currents that cause seafloor spreading thought to be located?
Asthenosphere
What is the law of superposition?
The basis for the understanding of the sequence of past geologic events
At a subduction zone in the ocean, what is formed?
Trench
What are the majority of inferences(guesses) about the characteristics of Earth's mantle and core based on?
Seismic Waves in Earth's Interior
In the Atlantic Ocean where is the youngest seafloor located?
Along the Mid-Ocean Ridge
Which layer of Earth has the GREATEST density?
Inner Core
How does fossil evidence support Wegener's hypothesis of continental drift?
Similar fossils are found on landmasses far apart that suggest the continents were once together
What are the chemical layers of the Earth?
Crust, Mantle, Outer Core, Inner Core
Why does the oceanic crust sink beneath the continental crust at a subduction zone?
The oceanic crust has a greater density than the continental crust.
What evidence was used to support Continental Drift?
Continents fit together, fossils in different climates than normal, and similar mountain ranges on different continents.
A _________________ is a location in the mantle at which the temperature is abnormally high. In these places, magma forces its way up to the surface, forming a volcano.
Hot Spot
Fossil A is found in a rock layer below a layer containing Fossil B. Which fossil is probably older?
Fossil A
What are the mechanical layers of the Earth?
Lithosphere, Asthenosphere, Mesosphere, Outer Core, Inner Core