Super continent that existed 200 million years ago
What is Pangaea
100
Wegener noticed that fossils of animals and plants of the same species could be found on very distant continents. He used this type of evidence to support his theory.
What is fossil evidence?
100
These form long chains of mountains that rise up from the ocean floor
What are mid-ocean ridges?
100
The cracked pieces of the Earth's Lithosphere.
What are plates?
100
This is the theory that states that Earth's plates are in slow, constant motion driven by convection currents in the mantle.
What is the theory of Plate Tectonics?
200
Scientist who thought the continents were once a super continent
Who is Alfred Wegener
200
example of a transform boundary found in CA
What is San Andreas Foult
200
This technology, developed in the mid-1900's was used to map the ocean floors using sound waves.
What is sonar?
200
Breaks in Earth's crust where rocks have slipped past each other.
What are faults?
200
Name one example of a type of landform that can be created by the movement of a convergent boundary
mountains, plateaus, volcanoes
300
Wegener's hypothesis that the continents move slowly over the Earth's surface.
What is continental drift
300
What does Pangaea literally translate to?
What is "All Land" or "All Earth"
300
These deep canyons in the ocean are where old ocean rock is recycled back into the mantle at subduction zones.
What are deep-ocean trenches?
300
This is how fast the plates move.
As fast as a fingernail grows, around 2.5 centimeters/year
300
This is where subduction of the ocean floor takes place
What are deep-ocean trenches?
400
the process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle again
What is subduction
400
This is the book Wegener published explaining his theory of continental drift
What is "The Origin of Continents and Oceans"
400
This is the approximate amount of time it takes for the ocean floor to be renewed.
What is 200 million years?
400
This type of boundary movement results in the collision of two plates where one usually sinks beneath another
What are convergent boundaries?
400
Why are the oldest parts of the ocean floor no older than 200 million years?
Because that is generally how long it takes for new rock to form at mid-ocean ridges, move away from the ridge and be subducted into a deep ocean trench.
500
As material erupts, cools and hardens, magnetic minerals line up in the directions of the magnetic poles. These bands are evidence of sea floor spreading.
What are magnetic stripes?
500
Give one example of two land features/continents that used to be joined in Pangaea.
Many possible answers
500
Does the ocean floor keep getting wider without stopping? Explain.
No, eventually the ocean floor plunges into deep underwater canyons called deep-ocean trenches.
500
The San Andreas Fault is an example of this type of boundary.
What is a transform boundary?
500
Describe the changes that would occur on land and in the oceans if the land masses one day form a new super continent.