Sea-Floor Spreading Objectives
After completing the lesson, I will be able to:
explain the process of sea-floor spreading
list the evidence for sea-floor spreading
describe the process of subduction at deepocean trenches
Sea-Floor Spreading Key Terms (A)
(1) mid-ocean ridge(2) sonar(3) sea-floor spreading
Sea-Floor Spreading Key Terms (B)
(4) deep-ocean trench(5) subduction-
Sea-Floor Spreading
Checkpoint (A)
1) What evidence did scientists
find for sea-floor spreading?
* Write out answer in complete sentences
Sea-Floor Spreading
Checkpoint (B)-(150)
2) What device is used to map
the ocean floor?
* Write out answer in complete sentences
Sea-Floor Spreading
Applying Concepts (A)-(Figure 15)
Q) What happens to the rock
along the ridge when new
molten material erupts?
* Write out answer in complete sentences
Sea-Floor Spreading
Checkpoint (C)-(153)
3) Why does the rock of the
ocean floor have a pattern of
magnetic stripes?
* Write out answer in complete sentences
Sea-Floor Spreading
Applying Concepts (B)-(Figure 16)
Q) How are the matching
stripes along the mid-ocean
ridges evidence of sea-floor
spreading?
* Write out answer in complete sentences
Sea-Floor Spreading
Checkpoint (D)-(155)
4) Why is the Pacific Ocean
shrinking?
* Write out answer in complete sentences