World Ocean Chap 2

which of the following is a characteristic of oceanic continental convergent plate boundaries

andesitic volcanoes

which of the following is true about the asthenosphere

asthenosphere is composed of outer mantle material

the san andreas fault

continental transform fault

all continents fit together with the least number of overlaps and gaps when the continents are matched along

contours at around 2000 meters in depth

confirmation of seafloor spreading was supported by the

age of the seafloor

mid atlantic ridge is an example of

divergent boundary

convergent plate boundaries occur when tectonic plates move in opposite directions

false

oldest rocks are located at mid ocean ridges

false

paleomagnetism confirms that at particular times in the geologic past Earth has had more than one magnetic north pole

false

water depth decreases as you move away from the mid ocean ridge

false

what does not fit the pattern: aleutian islands, andes mountains, hawaiian islands, japan, mariana trench

hawaiian islands

moving from oceanic ridge to oceanic trench the age of lithosphere

increases in proportion to the distance

differences in height between continental crust and oceanic crust are explained by

isostasy

vine and matthews determined that new ocean floor was being produced at ocean ridges by examining

magnetic pattern on the seafloor

what does not fit the pattern: hydrothermal vents, rift valley, oceanic ridge, oceanic trench, spreading center

oceanic trench

seafloor magnetic pattern is best described as

parallel to and symmetric about ocean ridges

all of the following provide evidence for continental drift except

seafloor magnetic pattern

deep focus earthquakres are often associated with deep sea trenches

true

fast moving spreading ridges tend to be more gently sloped than slow moving rides

true

relatively young age of the seafloor supports the idea that subduction must take place

true