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Chapter 1 Plate Tectonics

Across
This rocky section includes 2 layers
Center of the earth
Ocean valleys; subduction zones
Element in the atmosphere
The x -- is horizontal
A fossil is evidence in rock of an ancient ---
These separate continental plates and are where new crust is formed.
Wegener changed our thinking about how _ are formed.
The -- fit of the present day continents is evidence of continental drift
A supercontinent
Credited with plate tectonic theory
Boundaries where plates slide past each other
To use evidence and predict and answer or explain past events
Rocky layer of crust and mantle that makes up plates
Percent --- tells relatively how far away from the accepted answer your work is.
Boundaries where plates spread apart
Steel is made or --- and carbon.
Down
Important element in the atmosphere
Symbol Na
A continent that seems to fit with Africa
Wegener died without a satisfactory -- for his hypothesis.
Proposed the theory of continental drift
One type of evidence of continental drift
Softer part of the upper mantle
Convection currents occur here
Boundaries where plates move together
He explained sea floor spreading
To put things into groups
Symbol is F