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Techtonics test
| Word or question | answer |
|---|---|
| Pangaea | super continent that existed 200 million years ago |
| Alfred Wegener | scientist who thought that the continents were once one super continent |
| Mesasouris | reptile fossil found in South America and in Africa |
| sea-floor spreading | theory that new ocean crust is formed at the mid ocean ridges by molten lava |
| continental drift | theory that the continents move |
| divergent boundary | boundary between two plates that are moving apart |
| convergent boundary | boundary where two plates are moving toward each other |
| transform fault boundary | boundary where two plates are moving past each other |
| convection current | cycle of heating, rising, cooling and sinking |
| When a collision between an oceanic plate and a continental plate pushes the oceanic plate into and under the continental plate __________ takes place. | Subduction |
| mid-ocean ridge | example of a divergent boundary in ocean crust |
| When tectonic plates slide past each other a __________ is formed. | Fault |
| Transform boundaries (faults) cause __________. | earthquakes |
| A __________ __________ is a convergent boundary where an oceanic plate is pushed beneath a continental plate forming a trench. The oceanic crust melts resulting in the formation of volcanoes. | Subduction zone |
| trench | A deep depression of the sea floor caused by the subduction of one plate under another. |
| rift valley | A large valley shaped area of the Earth in which plates of the Earth's crust are moving away from each other, forming a system of cracks and faults. |
| Which two continents did Alfred Wegener think looked like they fit together like puzzle pieces? | South America and Africa |
| Scientists believe that convection currents in the __________ is responsible for the movement of the plates that form the Earth's crust. | Asthenosphere |
| For a convergent boudary how is the arows | -> <- |
| For deverget boundary arrows | <- -> |
| For transform boundary arows | ---> <--- |
| All the continents were once joined together in a single________and have since drifted apart. | Landmasses |
| Long chains of_______that rise up from the ocean floor. | Mountain |
| Earths plates are in slow, constant motion, driven by ___________ in the mantle. | Convection Currents |
| The_________________ that began to break apart about 250 million years ago. | Super continent |
| When the oceanic crust sinks back down into the mantle at a _____________________________. | mid-ocean ridge. |
| What are sonars used for? | It is used for tracking where an earthquake is. |
Created by:
YashasriRocks
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