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plate tec. keyterms
plate tectonic keyterm
| Question | Answer |
|---|---|
| the hypothesis that the continents slowly move across Earth’s surface | continental drift |
| the name of the single landmass that broke apart 200 million years ago and gave rise to today’s continents | Pangaea |
| the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary | subduction |
| a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust | plate |
| the theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle | plate tectonics |
| a break in the Earth’s crust where masses of rock slip past each other | fault |
| a plate boundary where two plates move away from each other | divergent boundary |
| a plate boundary where two plates move toward each other | convergent boundary |
| a plate boundary where two plates move past each other in opposite directions with no up or down motion | transform boundary |
| a trace of an ancient organism that has been preserved in rock or other substance | fossil |
| The instrument used to measure the strength of an earthquake | Seismograph |
| The point underground, where rock breaks and an earthquake is created | focus |
| The point on the Earth's surface, directly above an earthquake | epicenter |
| what landform is created when two continental plates converge | Mountains |
| The plate boundary around the Pacific Ocean, where most of the world's volcanoes are located. | Ring of Fire |
| Who developed the theory of Continental Drift? | Alfred Wegener |
| Why did most of the world not origninally accept the theory of continental drift? | There was no explanation for the force that moved the continents; why it happened |
| Name one piece of evidence that supports Sea Floor Spreading. | Eruptions of molten material, Drilling samples (ages of rocks), magnetic stripes |
| What type of plate boundary is most likely to have a volcano? | Convergent (subduction) |
| Name one piece of evidence that supports the theory of continental drift? | Evidence of climate change, matching fossils on different continents, matching landforms/minerals on different continents, shape of continents |
| Why does subduction occur? | Because Oceanic crust is much more dense that continental crust |
| Where does a rift valley form? | A divergent boundary between continental crust |
| What causes the movement of Earth's Plates? | Convection currents in the mantle |
Created by:
6thGradeScience
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