14.1 Earth’s Undersea World

Instructions

As read Chapter 9, “Earth’s Undersea World,” answer the following questions.

1

Seafloor spreading explains which of the following?

1

A. a warm, dark area on the sea floor 

B. a long, rugged underwater mountain range 

C. a cluster of seamounts 

D. a cluster of hydrothermal vents

9

2

6

2

Draggable item		Corresponding Item
One tectonic plate slides under another		islands are formed
Tectonic plates collide		a trench is formed
Water seeps into the earth’s crust and is heated by magma		seafloor spreading
Tectonic plates move apart very slowly		continental drift
Seamount emerges from the ocean’s surface		hydrothermal vents are formed
Seafloor spreading		mountains are formed