Vocabulary
Continental Drift
Snazzy Visuals
Sea Floor Spreading
Plate Tectonics
100
These events typically occur at or near plate boundaries. Ms. Julie, who group up in California, hates these things.
What are earthquakes?
100
This German meteorologist is credited with first proposing that at one time all of the continents formed a single landmass.
Who is Alfred Wegener?
100
Figure A is an illustration of this landmass.
What is Pangea?
100
Developed in the 1940's and 1950's, these types of waves are used to map large areas of the ocean floor.
What are sound waves?
100
The theory that Earth's crust and upper mantle are broken into pieces.
What is Plate Tectonics?
200
The name of the place where two plates separate.
What is the diverging boundary?
200
This states that at one time all of the continents formed a single land mass and that over time they have slowly moved into their current positions.
What is the hypothesis of Continental Drift?
200
Figure B shows what process?
What is continental drift.
200
These underwater mountain ranges can be found in the Atlantic, Pacific, and other oceans around the world.
What are mid-ocean ridges?
200
When two plates collide and push up the crust.
What is a continental collision?
300
This is the name of the place where plates come together.
What is converging boundary?
300
This is considered evidence to support the hypothesis of continental drift.
Why is the fact that rock formations from the same original formation, such as parts of the Appalachian Mountains, are found at different locations on the earth important?
300
Figure C shows which of the following processes occurring: A) continental drift B) sea floor spreading or C) magnetic reversal?
What is B) sea floor spreading?
300
This theory explains the process that occurs at mid-ocean ridges where new oceanic crusts are formed and get carried away from the ridge.
What is seafloor spreading?
300
These are formed as a result of continental collisions.
What are mountain ranges?
400
The name given to the landmass that was formed when all of the continents were joined together.
What is Pangea?
400
These are three main types of evidence that support the idea of continental drift.
What are rock, fossil, and climate clues?
400
According to Figure D, the Philippine Plate and the Indo-Australian plate forms this kind of boundary.
What is a convergent boundary?
400
As the sea floor spreads, this type of rock (located beneath the surface of the Earth) moves upward and is exposed to the ocean as it flows through cracks.
What is magma?
400
When continental plates pull apart they can form these.
What are rift valleys?
500
The name of the scientific theory that the earth crust is divided into plates that move and interact with each other.
What is plate tectonics?
500
Wegener's hypothesis of continental drift was not accepted by scientists in the early 1900s for this reason.
His hypothesis was so different from the accepted logic of the time and he was not able to explain how, when, or why these changes continued over time.
500
According to Figure D, the North American Plate and the Eurasian Plate form this kind of boundary.
What is a divergent boundary?
500
Scientists use this to compare rocks that are further away from a mid-ocean ridge to those that are closer. This evidence is used to prove the seafloor spreading theory.
What is the age of the rocks?
500
A divergent boundary found in the Atlantic Ocean, where the North American oceanic plate is moving away from the Eurasian and African oceanic plates.
What is the Mid-Atlantic Ridge?
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