Crossword

What do scientist use to explore the ocean floor?
What causes the plates to move?
When two plates collide
When two continents drift closer i causes the ocean to...?
Who started the theroy of continental drift?
Where does sea floor spreading begin?
Breaks in earths crust where rocks have sliped past each other
HIgh density objects tend to ...?
The ocean floor is renewed every ____ millon years.
The super contient from 300 million years ago.
When two plates slip past each other
When two plates divide aprt
When oceanic crust bends down wards
When earths crust diverges on land
When the ocean floor sinks and returns to the mantle
low density objects...
When mid-ocean ridges add new crust to the ocean floor
Subsection can change the ______ & shape of the oceans.
Convergent boundrys can produce.....
the outer most layer