Vocabulary
Structure of the Earth
Plate Tectonics I
Plate Boundaries
Plate Tectonics II
100
The thinnest layer of the Earth
What is the crust
100
There are ______________ main layers of the Earth.
What is three
100
Created the Continental Drift Theory
Who is Alfred Wegener?
100
Earthquakes, Volcanoes and mountains are usually located in relation to these.
What is a plate boundary?
100
Name four of the major plates
What is any of the following North American plate, South American plate, Eurasian Plate, Indoaustralia plate, African plate, Antarctica plate
200
The rigid, moving, pieces of Earth's crust and uppermost mantle
What is tectonic plates?
200
The thickest layer of the Earth
What is the mantle?
200
Discovered the evidence of sea floor spreading.
Who is Harry Hess?
200
The mid-ocean ridge is an example of a ____________________ boundary and ___________________ occurs here where new ocean floor is formed.
What is divergent boundary; sea-floor spreading?
200
Oceanic crust is more _________, than continental crust. Therefore, oceanic crust will subduct.
What is dense?
300
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory
300
Plates float on top of the _______________________.
What is the asthenosphere?
300
Earth is divided in 7 major sections that fit together like puzzle pieces.
How many major plates are there?
300
The Himalayan mountains are the result of a ___________________________ boundary.
What is a convergent boundary?
300
_________________ are a result from the build up of stress at a plate boundary.
What are earthquakes?
400
States that youngest rocks of ocean floor are at mid ocean ridges at divergent boundaries, moving outward
What is seafloor spreading?
400
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere?
400
A supercontinent that existed many million of years ago.
What is Pangaea?
400
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary?
400
This is the mechanism (what causes) the plates to move
What is convection cycles in the mantle?
500
Although the hottest layer of the Earth, this layer is solid metal
What is the inner core?
500
The Earth's crust is thinnest under the _____________________ and thickest under the _____________________.
What is thinnest under the ocean and thickest under the continents?
500
Continental Drift Theory was not accepted because it did not explain this, ____________.
What is how the continents moved?
500
The two types of convergent boundaries are ________________________ and ___________________.
What is subduction (where volcanoes often occur) and collision (where mountains are usually formed)?
500
This is what Hawaii is.
What is a hot spot?
M
e
n
u