Plate Boundaries

Question 1

The edges of the Earth’s plates MEET AT PLATE BOUNDARIES

Answer 1

Plate Boundaries

Question 2

Thea Earth’s Crust and upper mantle are broken into sections called

Answer 2

Litospheric Plate

Question 3

A theory that explains piece of earths litospheric are in constant motion, driven by convection currents in the mantle (ASTHENOSPHERE)

Answer 3

Theory of Plate Tectonics

Question 4

What makes the plates move?

Answer 4

Convection currents in the mantle move the plates as the core heats the slowly-flowing asthenosphere.

Question 5

Three Types of Boundaries

Answer 5

Divergent Boundary
Convergent Boundary
Transform Boundary

Question 6

A plate boundary where two plates move away from each other. (Rifting)

Answer 6

Divergent Boundary

Question 7

Causes of Divergent Boundary

Answer 7

Seafloor Spreading

Question 8

Rock gets thin in the middle as it is pulled apart. What kind of stress is this?

Answer 8

Tensional Stress

Question 9

what happens when the rock snaps from the stress of tension?

Answer 9

A normal fault occurs. The rock drops down as it breaks.

Question 10

A plate where two plates moves forward each other (colliding)

Answer 10

Convergent Boundary

Question 11

A geologic feature or events may form __________ on continents

________________ in the ocean

what are the other features?

Answer 11

RIFT VALLEYS
SEA-FLOOR SPREADING

Mid-ocean ridges
Fissure volcanoes

Question 12

A plate boundary where two plates move towards each other (colliding)

Answer 12

Convergent Boundary

Question 13

Boundaries between two plates that are colliding. What do you call this stress?

Answer 13

Compression Stress

Question 14

3 types of Convergent Boundary

Answer 14

Oceanic-Continental Plate
Oceanic-Oceanic Plate
Continental-Continental Plate

Question 15

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

Answer 15

Oceanic-Continental Plate

Question 16

Explain Oceanic-Continental PLate

Answer 16

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

Question 17

The less dense plate slides under the more dense plate creating a subduction zone called a TRENCH.

Answer 17

Oceanic-Oceanic Plate

Question 18

Explain Oceanic-Oceanic Plate

Answer 18

The less dense plate slides under the more dense plate creating a subduction zone called a TRENCH.

Question 19

A continental plate colliding with another continental plate

Have Collision Zones:
A place where folded and thrust faulted mountains form.

Answer 19

Continental-Continental Plate

Question 20

What geological feature can a Continental-Continental Plate form?

Answer 20

Mountain Ranges

Question 21

WHAT HAPPENS WHEN THE ROCK IS SQUEEZED FROM THE STRESS OF COMPRESSION?

Answer 21

A REVERSE FAULT

Rock is forced upward as it is squeezed.

Question 22

A plate boundary where two plates move past each other in opposite direction.

Answer 22

Transform Boundaries

Question 23

How is the rock broken at Transform Boundaries?

Answer 23

Rock is pushed in two opposite directions (or sideways, but no rock is lost)

Question 24

Rock is pushed in two opposite directions (or sideways, but no rock is lost). This stress is called ____________

Answer 24

SHEARING

Question 25

What can Transform Boundaries cause?

Answer 25

May cause Earthquakes when the rock snaps from the pressure.

A famous fault example is the San Andreas Fault in California.

Question 26

WHAT HAPPENS WHEN THE ROCK IS SHEARED (OR “CUT”) FROM THE STRESS OF SHEARING?

Answer 26

STRIKE-SLIP FAULT

Question 27

What is the super continental?

Answer 27

PANGAEA

Question 28

Wegener said that continents move around on Earth’s surface and that they were once joined together as a single supercontinent.

Answer 28

Continental drift theory