Characteristics of the Seafloor

Question 1

How does oceanic crust move along mid-ocean ridges?

Revolt · Accepted Answer

away from the ridge

Question 2

Which material rises from cracks in oceanic crust?

Revolt · Accepted Answer

molten rock

Question 3

Which is the first step in the seafloor spreading process?

Revolt · Accepted Answer

A crack forms in oceanic crust.

Question 4

Which information did the Glomar Challenger study in 1968?

Revolt · Accepted Answer

the age of rocks in various places in the ocean

Question 5

Which statement accurately describes one aspect of plate tectonics that involves subduction and seafloor spreading?

Revolt · Accepted Answer

Older crust is melted at subduction zones.

Question 6

Which concept is described in the theory proposed by Hess?

Revolt · Accepted Answer

Mid-ocean ridges are sites of seafloor spreading.

Question 7

Which evidence originally supported Hess’s idea of seafloor spreading in 1968?

Revolt · Accepted Answer

Younger rocks are closer to mid-ocean ridges.

Question 8

At the end of seafloor spreading, where does the molten rock solidify?

Revolt · Accepted Answer

center of the ridge

Question 9

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

Revolt · Accepted Answer

As the seafloor spreading occurs, the continents move.

Characteristics of the Seafloor Answers