Vocabulary
Structure of the earth
Continental drift theory
Plate tectonics
Layers of the earth
100
The thinnest layer of the earth
What is the crust
100
There are ______________ main layers of the Earth.
What is four
100
Created the Continental Drift Theory
What is Alfred Wegener
100
Earthquakes and Volcanoes are usually located in relation to these
What is a plate boundary
100
The outermost layer
What is crust
200
A Number of ridge'but moving, pieces of earths surface
What is tectonic plates
200
The thickest layer of the Earth
What is the mantle.
200
Evidence of matching animal fossils from two separate continents _____________________ and _____________________
What is Africa and South America
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
2nd outermost layers
What is lithosphere
300
The theory that all continents are fragments of pangeae are now driftin apart
What is continental drift theory
300
Plates float on top of the _______________________.
What isthe asthenosphere
300
Evidence of tropical plants were found on this continent
What is antarctica
300
Evidence of tropical plants were found on this continent
What is Antarctica
300
The 3rd layer
What is mantle
400
See that youngest rocks of ocean floor are at divergin boundarys, moving outwards
What is searord spreading
400
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What isvthe lithosphere
400
Pangaea existed this many millions of years ago
What is around 250 million years ago
400
This is the mechanism (what causes) the plates to move
What is convection cycles in the mantle
400
2nd hottest layer
What is outer core
500
Although the hottest part of the earth' this layer is solid metal
What is the inner core
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
What is What is subduction (where volcanoes often occur) and collision (where mountains are usually formed)
500
Hottest layer
What is inner core
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