Plate Techtonics

Question 1

Scientist that discovered the continents were once a supercontinent.

Answer 1

Wegener

Question 2

Theory that the continents were once a supercontinent and began to separate millions of years ago.

Answer 2

Continental Drift Theory

Question 3

The name given to the once supercontinent.

Answer 3

Pangaea

Question 4

Wegener could not explain his hypothesis of exactly what made the continents move.
True or False

Answer 4

True

Question 5

Evidence of continental drift which several
fossil organisms found on different landmasses.

Answer 5

Fossil Evidence

Question 6

Evidence of continental drift that proves that the continents once fit together perfectly. Another name for Pangaea.

Answer 6

Continental Puzzle.

Question 7

Evidence of continental drift that includes several mountain belts that end at one coastline, only to reappear on a landmass across the ocean.

Answer 7

Rock Evidence

Question 8

Evidence of continental drift includes several shows glacial deposits and ice sheets covered large areas of the Southern Hemisphere millions of years ago.

Answer 8

Glacier Evidence

Question 9

Theory in which the uppermost mantle, along with the overlying crust, moves as a strong, rigid layer called the lithosphere.

Answer 9

Plate Tectonics Theory

Question 10

One of numerous rigid sections of the lithosphere that move as a unit over the material of the asthenosphere.

Answer 10

Plates

Question 11

The place where two plates move apart. Add to the lithosphere

Answer 11

Divergent Boundary

Question 12

Form where two plates move together. Destroy the lithosphere.

Answer 12

Convergent boundary

Question 13

Two plates grind past each other without the production or destruction of the lithosphere.

Answer 13

Transform Fault Boundary

Question 14

Part of divergent plate boundaries that are
continuous elevated zones on the floor of all major ocean basins.

Answer 14

Ocean Ridges

Question 15

Deep faulted structures found along the axes of divergent plate boundaries.

Answer 15

Rift Valley

Question 16

Production of new oceanic lithosphere on divergent plate boundaries.

Answer 16

Seafloor Spreading

Question 17

When spreading centers develop within a continent, the landmass may split into two or more smaller segments

Answer 17

Continental Rift

Question 18

Occurs when one oceanic plate is forced
down into the mantle beneath a second plate.

Answer 18

Subduction Zone

Question 19

What are the 3 types of convergent boundaries?

Answer 19

Oceanic - Continental
Oceanic - Oceanic
Continental - Continental

Question 20

A denser oceanic slab that goes under the continent and sinks into the asthenosphere that causes pockets of magma to develop and rise to surface causing volcanic eruptions.
Ex Andes Mt.

Answer 20

Oceanic - Continental

Question 21

Form in part by volcanic activity caused by the subduction of oceanic lithosphere beneath a continent. Land Volcanoes.

Answer 21

Continental Volcanic Arc

Question 22

Two oceanic slabs converge, and one descends beneath the other which develops volcanoes on the ocean floor.
Ex Hawaiian Islands

Answer 22

Oceanic - Oceanic

Question 23

Form as volcanoes emerge from the
sea.

Answer 23

Volcanic Island Arc

Question 24

Occurs when subducting plates
contain continental material, two continents collide, which can produce new
mountain ranges, such as the Himalayas, Alps and Appalachian.

Answer 24

Continental - Continental

Question 25

An example of a transform fault boundary.

Answer 25

San Andreas Fault

Question 26

The natural remnant magnetism in rock bodies which is used to determine the location of the magnetic poles at the time the rock became magnetized.

Answer 26

Paleomagnetism

Question 27

When rocks show the same magnetism as the present magnetism field.

Answer 27

Normal Polarity

Question 28

When rocks show the opposite magnetism as the present magnetism field.

Answer 28

Reverse Polarity

Question 29

A concentration of heat in the mantle capable of producing magma, which rises to Earth’s surface and forms landmasses as the plate moves.

Answer 29

Hotspots

Question 30

The motion of matter resulting from changes in temperature.

Answer 30

Convection Flow

Question 31

A mechanism that contributes to plate motion in which cool, dense oceanic crust sinks into the mantle and “pulls” the trailing lithosphere along.

Answer 31

Slab Pulls

Question 32

Causes oceanic lithosphere to slide down the sides of the oceanic ridge under the pull of gravity. It may contribute to plate motion.

Answer 32

Ridge Push

Question 33

Are masses of hotter-than-normal mantle material that ascend toward the surface, where they may lead to igneous activity.

Answer 33

Mantle Plums