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- 1. Multiple ChoiceScientists used the pattern of alternating normal and reversed polarity in rocks to create the geomagnetictime scale.sea-floor time scale.reversal time scale.normal time scale.
- 2. Multiple ChoiceWhat is an undersea mountain range that forms at a divergent boundary?a ridgea ripa rifta rent
- 3. Multiple ChoiceHow does sediment that is closer to a mid-ocean ridge compare to sediment that is farther away?It is larger.It is smaller.It is older.It is younger.
- 4. Multiple ChoiceMagnetic patterns on the ocean floor were puzzling because theyshowed alternating bands of normal and reversed polarity.indicated that all ocean rocks had reversed polarity.were not symmetrical.contradicted the idea of sea-floor spreading.
- 5. Multiple ChoiceWegener’s hypothesis of continental drift was finally confirmed byfossils from the same reptile found on two continents.evidence supporting the idea of sea-floor spreading.continental coastlines that fit together.the formation of mountain ranges such as the Andes.
- 6. Multiple ChoiceTectonic plates can includeonly asthenosphere.only oceanic crust.only continental crust.both oceanic and continental crust.
- 7. Multiple ChoiceThe Pacific Ring of Fire isa mid-ocean ridge.a chain of volcanic islands.a zone of active volcanoes.a rift valley.
- 8. Multiple ChoiceThe Himalaya Mountains were formed in a collision at adivergent boundary.convergent boundary.transform boundary.fracture zone.
- 9. Multiple ChoiceAn example of a transform boundary is theSan Andreas Fault in California.Nazca plate on the west coast of South America.Eurasian plate at the Mid-Atlantic Ridge.island arc of Japan.
- 10. Multiple ChoiceThe force exerted by the leading edge of a subducting plate isconvection.tectonic plate drag.ridge push.slab pull.
- 11. Multiple ChoiceWhat often forms when large terranes and continents collide?small volcanic islandscratonssmall coral islandsmajor mountain chains
- 12. Multiple ChoiceMadagascar has unique species of plants and animals becausecontinent movements separated populations of organisms.it was part of both Africa and India.it became attached to Africa 165 million years ago.tectonic plate movements melted the global ice sheet.
- 13. Multiple ChoiceModern climates are a result of past movements ofpopulations of organisms.tectonic plates.heat in Earth’s interior.rain and snow.
- 14. Multiple ChoiceNorth America and Eurasia were formed when a rift separated the continent ofPangaea.Gondwanaland.Laurasia.Panthalassa.
- 15. Multiple ChoiceAccording to Wegener, what happened about 200 million years ago?The South America and Nazca plates collided.The supercontinent began breaking into smaller continents.Magma rose to Earth’s surface and solidified.The continents drifted to their present locations.
- 16. Multiple ChoiceWhich of the following was NOT a piece of evidence Wegener found to support his hypothesis?debris from glaciers in southern Africamountains of similar age in North America and Scotlandtracks of continents plowing through ocean floor rockidentical Mesosaurus fossils in South America and Africa
- 17. Multiple ChoiceThe study of paleomagnetism was key in proving Wegener’s hypothesis becauseit provided evidence of sea-floor spreading.it proved that fossils in Africa and South America were identical.it indicated that tropical swamps covered areas that are now cold.it showed that mountains were formed by continental drift.
- 18. Multiple ChoiceThe theory that explains why and how continents move is calledcontinental drift.paleomagnetism.plate tectonics.sea-floor spreading.
- 19. Multiple ChoiceFrequent earthquakes in an area may indicatetectonic plate boundaries.sea-floor spreading.mantle convection.reversed polarity.
- 20. Multiple ChoiceConvection, ridge push, and slab pull work together to producecontinental lithosphere.tectonic plate motion.earthquakes.fracture zones.
- 21. Multiple ChoiceA terrane becomes part of a continent in a process calledrifting.converging.slab pull.accretion.
- 22. Multiple ChoiceWhat is one way tectonic plate movement affects climate?It creates mountains that affect wind patterns.It changes the location of the equator and the poles.It keeps ice sheets from melting.It keeps air temperatures constant.
- 23. Multiple ChoicePanthalassa wasthe supercontinent that formed before Pangaea.one of the continents that formed from Pangaea.the large ocean that surrounded Pangaea.a body of water cut into the eastern edge of Pangaea.
- 24. Multiple ChoiceThe splitting of Pangaea into two continents is part ofthe process of accretion.a convection cell.the process of slab pull.the supercontinent cycle.
- 25. Multiple ChoiceThe most conclusive proof for continental drift was provided bythe coastlines of continents on a map.evidence of sea-floor spreading.identical fossils found on two separate continents.changes in climatic patterns.
- 26. Multiple ChoiceTectonic plates are blocks ofmagma.magnetic rock.asthenosphere.lithosphere.
- 27. Multiple ChoiceAt the center of a mid-ocean ridge is a(n)subduction zone.fracture zone.rift valley.deep-ocean trench.
- 28. Multiple ChoiceWhere do deep-ocean trenches form?in island arcsat convergent boundariesin fracture zonesat transform boundaries
- 29. Multiple ChoiceWhat occurs at a transform boundary?Oceanic lithosphere collides with continental lithosphere.Magma rises to the surface and forms a mid-ocean ridge.Two plates slide past each other horizontally.Two plates collide and crumple.
- 30. Multiple ChoiceBuilt-up heat from the mantle that weakens lithosphere causescratons.rifting.accretion.atolls.
- 31. Multiple ChoiceOne result of the collision that formed Pangaea wasthe Appalachian Mountains.the continent of Gondwanaland.the South Atlantic Ocean.the Himalaya Mountains.
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