Characteristics of the Seafloor Quiz
Which statement describes the relationship between seafloor spreading and continental drift?
As the seafloor spreads, the continents move in the same direction
How do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading?
NOT: They show when Earth's poles reversed.
According to the theory proposed by Harry Hess, what causes continents to move? continental drift magnetic polarity seafloor spreading deep-ocean trenches
NOT: magnetic polarity
When scientists analyzed drilling samples from the Glomar Challenger study, which discovery did they make about rocks in relation to a mid-ocean ridge?
Rocks closer to the ridge are newer.
Why do rocks on the ocean floor form a pattern of magnetized stripes?
The rocks contain iron that points in different directions depending on Earth's polarity.
Which type of material becomes molten rock at subduction zones?
continental crust
Which material rises from cracks in oceanic crust?
molten rock
Which information did the Glomar Challenger study in 1968?
the age of rocks in various places in the ocean
