Lesson 1.4 Characteristics of the Seafloor Answers

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Which event causes the formation of trenches in Earth’s crust?

magma rising

mantle emerging

volcanoes erupting

lithosphere colliding

Which statement describes the relationship between seafloor spreading and continental drift?

As the seafloor spreading occurs, the continents do not move.

As the continents move, they pull the seafloor with them.

As the continents move, they create new seafloor at the coast.

As the seafloor spreading occurs, the continents move.

Which material rises from cracks in oceanic crust?

dense crust

molten rock

continental crust

pillow-shaped rocks

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