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Study Guide Quiz 2 Plate Tectonics
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The youngest rocks found in the ocean are found at the mid-ocean ridge
The crust and upper mantle make up the Earth’s lithosphere
Plates move anywhere from 1-12cm per year
The plates of the lithosphere float on the asthenosphere
The results of plate movements can be seen at plate boundaries
The Himalaya mountains are the result of a collision between the indo-Australian
plate and Eurasian plate
The presence of the same fossils and same rocks found on different continents help
support Continental drift
Continental drift is the theory that the continents have slowly moved to their
current locations
Divergent boundaries are where plates are moving apart
Iron material found in rocks at the mid-ocean ridge prove that Earth’s magnetic
field has shifted in the past
Transform boundaries are where plates slide past each other
Convergent boundaries are where plates are moving towards each other
Seafloor spreading occurs where molten material rises up from under Earth’s
surface
Scientist have found alternating bands of magnetism when studying rocks on the
oceans floor
In continental drift the continents have moved very slowly to their current positions
Matching rock structures on different continents help prove the theory of
continental drift
Convection currents inside earth drive plate motion
Density differences cause liquid rock to rise up through the asthenosphere
In a convection current the hot material must eventually sink back into the earth
The great Rift Valley in Africa is an example of a divergent plate boundary
The Andes mountains are an example of a Convergent boundary
Active volcanoes are most likely to be found at convergent oceanic to continental
plate boundaries
Mountain ranges form when 2 continental plates collide at a convergent boundary
The San Andreas fault is an example of a transform boundary
A subduction zone forms where 2 oceanic plates collide