Chapter 7

What technology has scientists used to map the ocean floor?

What type of rock forms when lava cools and crystallizes on the seafloor?

What causes plate motion?

Two plates of equal density form mountain ranges along

The sinking of a denser plate below a more buoyant plate at a convergent plate boundary is a

Ridge push is the result of

What is the lithosphere?

Which plate tectonic process creates a deep ocean trench?

Two plates slide past each other at a

What is the asthenosphere?

Which of Earth's outermost layers includes the crust and the upper mantle?

Alfred Wegener proposed the ________ hypothesis.

Oceanic crust colliding with a continental crust will form

Mid-Ocean ridges are associated with

Which of the following is NOT evidence for the continental drift hypothesis?

Which can be used as an indicator of past climate?

_______ is a force created by sinking of a plate, or slab, that pulls on the rest of the plate.

Ocean crust is

What evidence helped to support the theory of seafloor spreading?

The theory ___ states that Earth's surface consists of plates that move relative to one another

What happens to earth's magnetic field over time?

New ocean crust forms and old oceanic crust moves away from a mid-ocean ridge during