What causes magnetic stripes on the seafloor, such as

Problem 101MCQ Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle A. Likely B. Unlikely

Problem 102MCQ Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle A. Likely B. Unlikely

Problem 103MCQ Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle A. Likely B. Unlikely

Problem 104MCQ Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle A. Likely B. Unlikely

Problem 1MCQ Which of the following features is present on the seafloor off the Pacific Northwest? A. world’s largest oceanic plateau B. long, fairly straight fracture zone C. world’s largest linear island chain D. island arc within oceanic plates

Problem 106MCQ Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle A. Likely B. Unlikely

Problem 105MCQ Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle A. Likely B. Unlikely

Problem 2MCQ On this map of the south Atlantic, what is the feature that makes a zigzag pattern on the seafloor? A. island arc B. linear island chain C. subduction zone D. mid-ocean ridge E. none of these

Problem 107MCQ Based on the position of the houses on Continent A, which one is built in the safest location? A. House A B. House B C. House C D. House D E. House E

Problem 4MCQ On this map of the south Atlantic, why is the mid-ocean ridge in the center of the ocean? A. Subduction is consuming seafloor beneath both adjacent continents. B. Seafloor is added to both sides during seafloor spreading. C. Subduction has occurred under one and then another of the adjacent continents. D. Seafloor spreading has stopped in this area.

Problem 3MCQ Why does the Tibetan Plateau, shown in this figure, have a high elevation? A. transform faulting B. seafloor spreading C. continental rifting D. continental collision E. hot-spot activity

Problem 5MCQ On this southern continent, which side has a plate boundary? A. the left (west) side B. the right (east) side C. both sides D. neither side

Problem 6MCQ In this figure of Japan, what do the offshore trenches indicate? A. continental rifting B. a rift in a mid-ocean ridge formed by seafloor spreading C. a rift in a mid-ocean ridge formed by transform faulting D. subduction of oceanic crust

Problem 8MCQ Which of the following features is associated with a deep oceanic trench? A. mid-ocean ridge B. linear island chain C. seamount D. island arc

Problem 13MCQ The main reason why the hypothesis of continental drift was not widely accepted was: A. The hypothesis required that the entire Earth was once frozen. B. The hypothesis required long, narrow land bridges that did not exist. C. There was no mechanism to move continents through the oceanic crust. D. All of these were reasons the hypothesis was not widely accepted.

Problem 10MCQ On this map, identify which letter is over the Atlantic ocean. A. A B. B C. C D. D E. feature is not labeled

Problem 7MCQ How did the Red Sea, shown between Arabia and Africa in this figure, form? A. subduction of Arabia beneath Africa B. subduction of Africa beneath Arabia C. a continental collision D. continental rifting followed by seafloor spreading E. transform faulting followed by a continental collision

Problem 11MCQ On this map, identify which letter is over the Pacific Ocean. A. A B. B C. C D. D E. feature is not labeled

Problem 14MCQ What ideas brought a renewed interest to the idea of continental drift? A. data that a submarine mountain occurred beneath the middle of the Atlantic Ocean B. evidence that the entire Earth was once frozen C. evidence that similar meteorites fall on different continents D. evidence that a large meteorite caused extinction of the dinosaurs

Problem 15MCQ Which data were used to develop the hypothesis of continental drift? A. the shape of the continents B. the distribution of fossils C. the distribution of glacial deposits and directions of glacial scratch marks D. all of these

Problem 12MCQ On this map, identify which letter is over an island arc. A. A B. B C. C D. D E. feature is not labeled

Problem 9MCQ On this map, identify which letter is over a mid-ocean ridge. A. A B. B C. C D. D E. feature is not labeled

Problem 16MCQ Which area(s) on this world map is likely to have volcanoes above sea level? A. A B. B C. C D. D

Problem 18MCQ Which of the following statements is true? A. Earthquakes are more widespread than volcanoes or high mountains. B. High mountains are more widespread than volcanoes or earthquakes. C. Volcanoes are more widespread than earthquakes or high mountains.

Problem 17MCQ Which area(s) on this world map are likely to be near a plate boundary? A. A and B B. A and D C. B and D D. C and D E. A, B, and C only

Problem 19MCQ Which area(s) on this world map is likely to have earthquakes? A. A B. B C. C D. D E. A, B, and C only

Problem 21MCQ A divergent plate boundary is most likely associated with a(n): A. oceanic trench B. mountain belt or island arc C. mid-ocean ridge D. none of these

Problem 20MCQ This figure depicts what type of boundary? A. oceanic divergent boundary B. ocean-ocean convergent boundary C. ocean-continent convergent boundary D. transform boundary E. continental collision

Problem 22MCQ An oceanic transform plate boundary is most likely associated with a(n): A. oceanic trench B. mountain belt or island arc C. mid-ocean ridge D. all of these

Problem 23MCQ A convergent plate boundary is most likely associated with a(n): A. oceanic trench B. a linear chain of island C. mid-ocean ridge D. transform fault E. none of these

Problem 24MCQ What types of plate boundaries are shown in this figure? A. divergent B. convergent C. transform D. divergent and transform E. convergent and divergent

Problem 25MCQ What type of plate boundary is depicted by the smaller arrows in the center of this figure? A. divergent boundary B. convergent boundary C. transform boundary D. hot spot E. none of these

Problem 26MCQ What type of plate boundary is depicted in this figure? A. continental rift B. ocean-ocean convergent boundary C. ocean-continent convergent boundary D. divergent and transform boundaries E. continental collision

Problem 28MCQ Which way are the plates moving in this figure? A. away from each other B. directly toward each other C. toward each other at an angle D. horizontally sliding by one another E. there is no way to tell

Problem 31MCQ What occurs at mid-ocean ridges? A. oceanic crust is destroyed B. continental crust is destroyed C. oceanic crust is created D. continental crust is created E. all crust is destroyed by magma

Problem 30MCQ Mid-ocean ridges form where two ocean plates: A. collide B. diverge C. subduct D. slide past each other E. are destroyed

Problem 29MCQ What is being depicted by this figure? A. continental collision B. continent-continent convergence C. early stages of seafloor spreading D. early stages of subduction E. a boundary that is mostly a transform fault

Problem 27MCQ What type of plate boundary is depicted in this figure? A. oceanic divergent boundary B. ocean-ocean convergent boundary C. ocean-continent convergent boundary D. continental collision boundary E. transform boundary

Problem 32MCQ Mid-ocean ridges are higher than surrounding oceanic crust primarily because: A. two plates are colliding B. the crust is thicker C. the crust is stronger D. transform faulting uplifts the rocks E. the lithosphere is thinner and hotter

Problem 33MCQ The main way new oceanic crust is created is by: A. eruption of lavas and solidification of magmas at depth B. sediment scraped off a subducting slab C. continents that subside below sea level D. continental rifting, before the continents separate E. magmas along an ocean-continent convergent boundary

Problem 35MCQ Which of the following best represents the sequence by which a continent splits apart? A. seafloor spreading, then continental rifting, then uplift due to mantle upwelling B. continental rifting, then seafloor spreading, then uplift due to mantle upwelling C. uplift due to mantle upwelling, then continental rifting, then seafloor spreading D. none of these

Problem 37MCQ Which of the following is associated with a mid-ocean ridge? A. an island arc B. magma produced as the mantles rise up C. melting of the subducting plate D. lower topography than surrounding seafloor E. continental rift

Problem 34MCQ The stages associated with continental rifting are, in order from earliest to latest: A. narrow ocean basin, continental rift, uplift, wide ocean basin B. narrow ocean basin, wide ocean basin, continental rift, uplift C. uplift, wide ocean basin, narrow ocean basin, continental rift D. wide ocean basin, narrow ocean basin, uplift, continental rift E. uplift, continental rift, narrow ocean basin, wide ocean basin

Problem 36MCQ Which of the following contains a modern continental rift? A. eastern North America B. eastern Africa C. eastern Europe D. eastern Pacific Ocean E. East Timor

Problem 38MCQ Which of the following is NOT happening in the area shown by this figure? A. plates are moving apart B. eruptions onto the seafloor C. release of water by a descending plate D. melting of rising mantle E. faulting

Problem 39MCQ Which feature on this figure is formed by bending of the subducted plate? A. A B. B C. C D. D E. E

Problem 40MCQ Which feature on this figure is formed by bending of the subducted plate? A. A B. B C. C D. D E. E

Problem 42MCQ On the accompanying figure the plate boundary is located between: A. A and B B. B and C C. C and D D. D and E E. there is not enough information to tell

Problem 43MCQ A continent has an oceanic trench offshore of its coast. Which of the following is probably NOT present along this side of the continent? A. a mountain belt B. earthquakes C. volcanoes D. melting along a mid-ocean ridge E. subduction of an oceanic plate

Problem 41MCQ The plate boundary on the this figure is located between: A. A and B B. B and C C. C and D D. D and E E. there is not enough information to tell

Problem 44MCQ Which feature on this figure is formed by melting of mantle above the slab? A. A B. B C. C D. D E. E

Problem 45MCQ Which feature on this figure is formed by melting of mantle above the slab? A. A B. B C. C D. D E. E

Problem 46MCQ On this figure of a continental collision, which continent would have had subduction-related magmatism before the collision? A. the continent on the left B. the continent on the right C. both continents D. neither continent

Problem 49MCQ On the accompanying figure, what type of feature is located in the area of number 3? A. transform fault B. mid-ocean ridge C. linear island chain D. fracture zone

Problem 47MCQ On this map of the South Atlantic, which letter is on a transform fault? A. A B. B C. C D. D E. E

Problem 50MCQ On the accompanying figure, what type of feature is located in the area of number 4? A. transform fault B. mid-ocean ridge C. linear island chain D. fracture zone

Problem 48MCQ On this map of the South Atlantic, which letter is on an oceanic fracture zone? A. A B. B C. C D. D E. E

Problem 52MCQ On the accompanying figure, what type of feature is located in the area of number 2? A. transform fault B. mid-ocean ridge C. linear island chain D. fracture zone

Problem 51MCQ On this map of the South Atlantic, which letter is on a site of seafloor spreading? A. A B. B C. C D. D E. E

Problem 53MCQ This figure shows plate boundaries south of Alaska. Which location is on a transform boundary? A. 1 B. 2 C. 3 D. 4 E. 2 and 3

Problem 55MCQ This figure shows plate boundaries south of Alaska. Which location is along a convergent boundary? A. 1 B. 2 C. 3 D. 4 E. 2 and 3

Problem 54MCQ This figure shows plate boundaries south of Alaska. Which location is likely to contain volcanoes above a subduction zone? A. 1 B. 2 C. 3 D. 4 E. 2 and 3

Problem 56MCQ A force that is important in driving plate tectonics is: A. slab pull B. ridge push C. upwelling mantle, such as in hot spots D. all of these

Problem 57MCQ How fast do plates move relative to one another? A. centimeters per year B. meters per year C. kilometers per year D. one hundred kilometers per year

Problem 58MCQ When a plate boundary changes its orientation, it can change from: A. a spreading center to a transform fault B. a transform fault to a spreading center C. a transform fault to a subduction zone D. all of these E. none of these

Problem 59MCQ What causes magnetic stripes on the seafloor, such as those shown here? A. Volcanic rocks in oceanic crust are covered by a variable thickness of sediment. B. Some oceanic crust consists of volcanic rocks and some is composed of sediment. C. Sometimes Earth's magnetic field points north and sometimes it points south. D. Some volcanic rocks are formed in normal ways and others have pillows.

Problem 60MCQ This diagram shows magnetic stripes on either side of the mid-ocean ridge. How many times did the magnetic field change polarity to form all of the stripes shown here? A. twice B. three times C. five times D. eleven times

Problem 61MCQ This diagram shows magnetic stripes on either side of the mid-ocean ridge. How many different ages of stripes are represented in this diagram? A. 2 B. 3 C. 4 D. 6 E. 11

Problem 62MCQ The Earth’s magnetic field is generated by: A. salty water moving through the deep parts of the crust B. convection currents in the asthenosphere C. movement of iron and electrical currents within Earth’s outer core D. aligned magnetic minerals within Earth's inner core

Problem 65MCQ What are some uses of magnetic reversals? A. matching the patterns of reversals in a rock sequence to the magnetic timescale B. studying magnetic stripes on the seafloor C. calculating rates of seafloor spreading D. all of these

Problem 63MCQ If the area shown in this figure is 240 kilometers wide, and the oldest crest is 4 million years old, what was the approximate rate of seafloor spreading across this ridge? A. 0.24 kilometers per million years B. 2.4 kilometers per million years C. 60 kilometers per million years D. 240 kilometers per million years E. 960 kilometers per million years

Problem 64MCQ What is associated with reversed magnetic polarity? A. a compass needle would point south B. the magnetic signal of seafloor formed with this polarity would be stronger compared to adjacent areas of the seafloor C. there are much fewer intervals of reversed polarity than normal polarity D. all of these

Problem 67MCQ On the accompanying figure, which letter is over the youngest oceanic crust? A. A B. B C. C D. D E. E

Problem 66MCQ On the accompanying figure, which letter is over the oldest oceanic crust? A. A B. B C. C D. D E. E

Problem 69MCQ On the accompanying figure, which letter is over the oldest oceanic crust? A. A B. B C. C D. D E. E

Problem 68MCQ On the accompanying figure, which letter is likely over oceanic crust that is similar in age to that beneath letter E? A. A and B B. B C. C D. D

Problem 73MCQ On this map of South America, which features are NOT on a plate boundary? A. A and B B. B and C C. C and D D. D and E E. all of the features are on a plate boundary

Problem 72MCQ Where is subduction occurring on this figure of South America? A. A B. B C. C D. D E. E

Problem 74MCQ On this map of South America, which features are NOT on a plate boundary? A. A and B B. B and C C. C and D D. D and E E. all of the features are on a plate boundary

Problem 71MCQ Where is subduction occurring on this map of South America? A. A B. B C. C D. D E. E

Problem 70MCQ On the accompanying figure, which letter is over the youngest oceanic crust? A. A B. B C. C D. D E. E

Problem 75MCQ Which location on this figure from the Investigation is located on a divergent plate boundary? A. 1 B. 2 C. 3 D. 4 E. 5

Problem 76MCQ Which location on this figure from the Investigation is located on a convergent plate boundary? A. 1 B. 2 C. 3 D. 4 E. 5

Problem 78MCQ Which location on this figure from the Investigation is located on a passive continental margin? A. 1 B. 2 C. 3 D. 4 E. 5

Problem 79MCQ Which location on this figure from the Investigation is most likely to have volcanoes formed above a subduction zone? A. 1 B. 2 C. 3 D. 4 E. 5

Problem 77MCQ Which location on this figure from the Investigation is located on the abyssal plain? A. 1 B. 2 C. 3 D. 4 E. 5

Problem 80MCQ On the accompanying map, earthquakes are least likely at locations: A. 1, 2, and 3 B. 1 and 4 C. 1 and 5 D. 2, 3, and 4 E. 4 and 5

Problem 81MCQ On the accompanying map, large destructive earthquakes that affect land are most likely at locations: A. 1 and 2 B. 2 and 3 C. 4 and 5 D. 1 and 4 E. 1 and 5

Problem 84MCQ On the accompanying map, earthquakes are most likely at locations: A. 1, 2, and 3 B. 1 and 4 C. 1 and 5 D. 2, 3, and 4 E. 4 and 5

Problem 82MCQ On the accompanying map, volcanic eruptions are most likely at locations: A. 1 and 2 B. 2 and 3 C. 3 and 4 D. 1 and 3 E. 2 and 5

Problem 83MCQ The feature at location 3 is probably: A. a divergent boundary B. a convergent boundary C. a subduction zone D. where two plates are colliding E. not a plate boundary

Problem 85MCQ Volcanoes that present major hazards to people living on the continents are likely at location: A. 1 B. 2 C. 3 D. 5 E. 1, 2, and 5

Problem 86MCQ The safest place for humans to live, away from volcanic activity and earthquakes, is: A. 1 B. 2 C. 3 D. 4 E. 5

Problem 91MCQ Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle. A. Likely B. Unlikely

Problem 90MCQ Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle. A. Likely B. Unlikely

Problem 88MCQ Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle. A. Likely B. Unlikely

Problem 87MCQ The continental edge between locations 4 and 5 is probably: A. a divergent boundary B. a convergent boundary C. an active continental rift D. where two plates are colliding E. not a plate boundary

Problem 92MCQ Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle. A. Likely B. Unlikely

Problem 89MCQ Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle. A. Likely B. Unlikely

Problem 93MCQ Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle. A. Likely B. Unlikely

Problem 97MCQ Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle. A. Likely B. Unlikely

Problem 94MCQ Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle. A. Likely B. Unlikely

Problem 99MCQ Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle A. Likely B. Unlikely

Problem 95MCQ Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle. A. Likely B. Unlikely

Problem 98MCQ Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle A. Likely B. Unlikely

Problem 96MCQ Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle. A. Likely B. Unlikely

Problem 100MCQ Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle A. Likely B. Unlikely