Plate Tectonic study guide

Question 1

What is continental drift theory

Answer 1

The idea that continents move over time

Question 2

What is a convergent boundary|CB

Answer 2

A location where two tectonic plates move toward each other and collide

Question 3

CB: Oceanic-Continental

Answer 3

Volcanoes

Question 4

CB:Continental-Continental

Answer 4

Mountains

Question 5

CB:Oceanic-Oceanic

Answer 5

Volcanic Island Arcs

Question 6

What is a divergent boundary| DB

Answer 6

Where two tectonic plates divide

Question 7

DB:Continental-Continental

Answer 7

Rift Valleys

Question 8

DB: Oceanic-Oceanic

Answer 8

Mid-Ocean Ridge

Question 9

Transform boundaries

Answer 9

Where two plates slide past each other

Question 10

Normal Fault

Answer 10

Form when rocks undergo tension.Rocks above the fault surface moves downward in relation to rock below the fault surface.

Question 11

Reverse Fault

Answer 11

Form from compression forces.Rocks above a reverse Fault surface is forced up and over the rock below the fault surface

Question 12

Strike-Slip

Answer 12

Produced by shear forces pushing rocks in somewhat opposite horizontal directions

Question 13

Fossil

Answer 13

Prehistoric petrified organisms

Question 14

Pangaea

Answer 14

Super continent where all the continents were once joined

Question 15

Mid-Ocean Ridge

Answer 15

A divergent boundary where molten lava flows out of and creates seafloor spreading in the ocean.

Question 16

Sea-floor Spreading

Answer 16

The making of new crust which spreads the ocean floor and recycles old crust to make more crust.

Question 17

Deep-Ocean Trench

Answer 17

A steep trench made by convergent boundaries being the deepest part of the ocean.

Question 18

Subduction

Answer 18

When two plates collide and the denser one subducts under the less dense one it is colliding with

Question 19

Plate Tectonics

Answer 19

The theory that Earth sits and moves on plates

Question 20

Rift Valley

Answer 20

Valley made by divergent boundaries

Question 21

Plate

Answer 21

A sections of the earth that are always moving

Question 22

Panthalassa

Answer 22

All Ocean

Question 23

What did wegener think happens during continental drift

Answer 23

That a huge supercontinent Pangaea once broke up and moved to their current positions

Question 24

Why are the oldest parts of the ocean floor no older than about 200 million years old?

Answer 24

This is because during seafloor spreading old crust gets recycled through subduction

Question 25

How does the density of the oceanic crust differ from that of the continental crust? Why is this difference important?

Answer 25

The different densities of the oceanic and continental crust is that the oceanic crust is more dense because it is always being recycled while the older crust on continental is weaker and old. For this reason this is important, this make it so that subduction may occur for seafloor spreading

Question 26

What is the evidence Wegener used to think that continents moved

Answer 26

Fossils,Rock samples,climates, and landforms

Question 27

What force causes the movements of Earths plates

Answer 27

Convection Currents

Question 28

Rocks on either side of a ______ Fault slip pass each other with little up and down motion

Answer 28

Normal

Question 29

What do the magnetic bands on the seafloor indicate

Answer 29

This indicates how many magnetic reversals the Earth has experienced

Question 30

What evidence is there for plate tectonics

Answer 30

The geologic events that occur at plate boundaries such as earthquakes and volcanic eruptions

Question 31

What happens at subduction zones

Answer 31

Two plates come together of different densities and one sinks under the other and melts

Question 32

What is the creation of new crust at divergent oceanic boundaries called

Answer 32

Sea-floor Spreading

Question 33

What are the three main types of plate boundaries that exist

Answer 33

Convergent,Divergent, and Transform

Question 34

Which boundary is characterized by the creation of volcanic mountain ranges

Answer 34

Convergent boundaries

Question 35

What type of plate boundary exists in California along the San Andreas fault

Answer 35

Transform Boundary

Question 36

Which boundary is characterized by the creation of a mid-ocean ridge

Answer 36

Divergent Boundary

Question 37

The collision between the Indian plate and the Eurasian plate caused the formation of the himalayan mountain range

Answer 37

Continental-Continental

Question 38

The____ __ ____ is an area along the edge of the Pacific ocean where a large number of earthquakes and volcanic eruptions occur

Answer 38

Ring of fire

Question 39

A(n) _____ is a fracture or break in the rocks that make up Earths crust

Answer 39

Fault

Question 40

A(n) volcanic _____ ____ is a string of islands created from the volcanoes along a deep ocean trench

Answer 40

Island Arc

Question 41

Remember to study the.....

Answer 41

diagrams(especially the 10.3 notes)