Seafloor Spreading

Question 0

Sonar

Answer 0

A device that determines the distance of an object under water by recording echoes of sound waves

Question 1

Mid-Ocean Ridge

Answer 1

An undersea mountain chain where new ocean floor is produced; a divergent plate boundary

Question 2

Subduction

Answer 2

The process by which oceanic crust sinks beneath a deep-ocean trench and back into the the mantle at a convergent plate boundary

Question 3

Sea-Floor Spreading

Answer 3

The process by which molten material adds new oceanic crust to the ocean floor

Question 4

Deep-Ocean Trench

Answer 4

A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle