Vocabulary
The thinnest layer of the Earth with a high density.
What is the oceanic crust?
This layer of the Earth is the only liquid layer.
What is the outer core?
Created the Continental Drift Theory
Who is Alfred Wegener?
Earthquakes and Volcanoes are usually located.
What is a plate boundary?
The Himalayan mountains are the result of a ___________________________ boundary.
What is a convergent boundary?
A number of rigid, but moving, pieces of Earth's lithosphere and crust.
What are tectonic plates?
The thickest layer of the Earth.
What is the mantle?
Evidence of matching animal fossils from two separate continents of _____________________ and _____________________.
What is Africa and South America?
The mid-ocean ridge is an example of a ____________________ boundary.
What is divergent boundary?
Hot air or liquid is less ________________ than cool air or liquid.
What is dense?
The theory that all continents are fragments of Pangaea now drifting apart.
What is the Theory of Continental Drift?
Plates float move on this layer.
What is the asthenosphere?
Evidence of tropical plants were found on this continent.
What is Antarctica?
Name four of the largest plates.
What is any of the following North American Plate, South American Plate, Eurasian Plate, Australian Plate, African Plate, Antarctica Plate?
_________________ are a result from the build up of stress at a plate boundary.
What are earthquakes?
This concept states that youngest rocks of the ocean floor are at divergent plate boundaries and moving outward (away from the plate boundary).
What is seafloor spreading?
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere?
The Theory of Continental Drift was rejected because.
What is they didn't know how and/or why the plates moved?
This is the mechanism (what causes) the plates to move.
What are convection cycles in the mantle?
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary?
General Term for an Igneous Intrusion.
What is a pluton?
The Earth's crust is thinnest under the _____________________ and thickest under the _____________________.
What is thinnest under the ocean and thickest under the continents?
This Naval officer discovered the concept of seafloor spreading in the 1960s.
Who is Harry Hess?
The three types of convergent boundaries.
What is subduction (where volcanoes often occur), subduction (where trenches occur) and collision (where mountains are usually formed)?
The Ring of Fire has the most number of these three things.
What are Earthquakes, Volcanoes, and Trenches?