Plates tectonics
Continental Drift Theory
Miscellaneous
Structure of the Earth
Vocabulary
100
Earthquakes and volcanoes are usually located in relation to these
What is a plate boundary
100
Created the Continental Drift theory
Who is Alfred Weegner
100
The Himalayan mountains are the result of a _____________________ boundary
What is convergent boundary
100
There are ______________ main layers of the Earth.
What is four
100
Two plates move apart.
What is divergent
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
Evidence of matching animal fossils from two separate continents _____________________ and _____________________
What is Africa and South America
200
Hot air or liquid is less ________ than cool air or liquide
What is dense
200
The thickest layer of the Earth
What is the mantle
200
the thinnest layer of the earth
What is the crust
300
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
300
Evidence of tropical plants were found on this continent
What is Antarctica
300
__________ are a result from the build up stress at a plate boundary
What is earthquake
300
Plates float on top of the _______________________.
What is the asthenosphere
300
a number of ridge, but moving, pieces of the earth's surface
What is plate tectonics
400
This is the mechanism (what causes) the plates to move
What is the inner core
400
Pangaea existed this many millions of years ago
What is around 250 million years ago
400
The San Andreas Fault in California is an example of a ________________ boundary
What is transform boundary
400
This is the mechanism (what causes) the plates to move
What is convection cycles in the mantle
400
the theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift theory
500
subduction (where volcanoes often occur) and collision (where mountains are usually formed)
What is two types of convergent boundaries
500
Continental Drift Theory was not accepted because it did not explain this
What is how the continents moved
500
This person used sonar to map the bottom of the ocean and discovered the mid-ocean ridge in the Atlantic Ocean.
What is Harry Hess
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
Plastic like layer of Earth's surface below the lithosphere?
What is asthenosphere
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