Plate Tectonics

Question 1

Alfred Wegener in his * went against the notion that continents were static. He suggested a supercontinent called * broke into smaller fragments that * apart. Evidence includes:
1-4.
Without a mechanism, his ideas remained indisputable and one of hi arguments suggested that the continental crust separated from the oceanic crust in its movement.

Answer 1

Continental drift theory,
Pangaea
drifted
1. Continental fit of Africa and SA “jigsaw puzzle”
2. Rock sequences (matching mountain belts)
3. Fossils
4. Paleoclimate

Question 2

• coined by Harry Hess suggests that new oceanic crust is being pushed away from oceanic ridges

Answer 2

Seafloor spreading

Question 3

It involves the magnetic striped patterns mapped out previously which contains symmetrical stripes of rocks with different polarities moving away from oceanic ridges.

Answer 3

Vine-Matthews-Morley Hypothesis

Question 4

• suggests that the earth is made of major and minor lithospheric plates floating on an asthenosphere that interacts in different ways

Answer 4

Plate tectonics theory

Question 5

Those that move together by collision or subduction which forms mountain belts and subduction zones

Answer 5

Convergent plate boundaries

Question 6

Involve two lithospheric plates moving apart from one another resulting in * and *

Answer 6

Divergent plate boundaries

Rift zones, mid-oceanic ridges

Question 7

Those areas where plates slide past each other

Answer 7

Transform plate boundaries

Question 8

In convergent plate boundaries
O-O:
C-O:
C-C:

Answer 8

O-O: island arcs
C-O: continental volcanic/magmatic arcs
C-C: mountains