Continental Drift
Seafloor Spreading
Boundaries
Vocabulary
Hot Spots
100
This Scientist who came up with the hypothesis of continental drift
Who is Alfred Wegener?
100
The scientist who came up with the theory of sea floor spreading
Who is Harry Hess?
100
A boundary along whichtwo techtonic plate move move apart.
What is divergent boundary?
100
A deep valley formed as tectonic plates move apart.
What is a Rift Valley?
100
Common where hot spots are.
What are volcanoes?
200
Continents drifted to their current locations is called what?
What is continental drift?
200
__________ was used to discovered mountain ranges in the middle of many oceans
What are sound waves?
200
A boundary along which two tectonic plates push together
What is convergent boundary
200
A thin outer layer of Earth and is above the mantle. THis is about 40 kilometers thick.
What is the crust?
200
Because of volcanoes forming in the oceans, these form too.
What is an island?
300
Evidence such as the continents' puzzle-like fit and similar ________ were found on different continents
What are fossils?
300
Magma rises at mid-ocean ridges because it is _______ dense
What is less?
300
A boundary along which two tectonic plates scrape past each other.
What is transform boundary?
300
An area where a column of hot material rises from deep within a planet's mantle.
What is a hot spot?
300
Hot spots provide a great deal of ______ _____.
What is molten magma?
400
These type of clues are evidence of tropical plants in polar regions and glacial deposits in tropical regions
What are climate clues?
400
The location of the youngest rocks on the seafloor
What is mid-ocean ridge?
400
Characterized by either subduction or a continental collision.
What is a convergent boundary?
400
A hypothical supercontinent that include every landmass on Earth that were fit together.
What is Pangea?
400
What geologists use hot spot volcanic chains to track this movement.
What are tectonic plates?
500
Mesosaurus fossils were found in South America and ________
What is Africa?
500
When oceanic plates move apart (diverge), tensional stress begins to occur in this part of the crust and upper mantle.
What is the lithosphere?
500
Characterized by either a mid-ocean ridge or a continental rift valley.
What is a divergent boundary?
500
The layer of Earth made up of the crust and the rigid rock of the upper mantle.
What is the lithosphere?
500
Most hot spot volcanoes.
What are basaltic volcanic?
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