Evidence Of Plate Movement: Seafloor Spreading Theory

Question 1

SONAR

Answer 1

Sound Navigation and Ranging - a device that bounces waves off the seafloor to explore the sea and find out its depth

Question 2

Harry Hammond Hess

Answer 2

American geologist. Proposed the seafloor spreading theory in the 1960’s

Question 3

Seafloor Spreading

Answer 3

Process where new oceanic crust is formed at mid-ocean ridges and slowly pushes the old crust away toward the subduction zone

Question 4

Evidence of Seafloor Spreading

Answer 4

1. Age of rocks
2. Magnetic reversal