Plate Tectonics

Question 1

From the seismogram, the distance to the epicenter can be determined by measuring

Answer 1

difference in the arrival times of the P and S-waves

Question 2

When two tectonic plates collide, the oceanic crust usually subducts beneath the continental crust because it is

Answer 2

Denser than the continental crust

Question 3

IfyouvisitaplaceinthePacificknowntobealongconvergingplates, which of these should you NOT expect to see?

Answer 3

a. active volcanoes C. rift valleys
b. mountain ranges d. volcanic islands

Question 4

You are an oceanographer and want to map the ocean floor on the east coast of the Philippines. As you do your study, you notice that there is a portion in the ocean floor which is relatively much deeper than the rest. What most likely is that deeper part?

Answer 4

Trench

Question 5

What do you expect to find at a mid-ocean ridge?

Answer 5

relatively young rocks

Question 6

Crustal plate A is moving away from crustal plate B. What is the expected average rate of change in position between A and B?

Answer 6

a few centimeters per year

Question 7

Which plate boundary is formed between the Philippine plate and the Eurasian plate?

Answer 7

convergent

Question 8

This part of the module will focus on the outermost layer which is called _____.

Answer 8

crust

Question 9

The plates move very slowly but constantly, and this movement is called _______ ; thus the theory of moving lithospheric plates is called ___________

Answer 9

tectonics

plate tectonics.

Question 10

Formula of Distance of the Epicenter

Answer 10

d = Td x 100 km/8 seconds
Where: d = distance (km)
Td = time difference in the arrival time of P-wave and S-wave

Question 11

mountains formed in part by igneous activity associated with subduction of oceanic lithosphere beneath a continent

Answer 11

Continental Volcanic Arc

Question 12

a boundary in which two plates move toward each other, causing one of the slabs of the lithosphere to subduct beneath an overriding plate

Answer 12

Convergent Boundary

Question 13

the thick part of the Earth’s crust, not located under the ocean

Answer 13

Continental Crust

Question 14

the thin part of the Earth’s crust located under the oceans

Answer 14

Oceanic Crust

Question 15

a region where the crustal plates are moving apart

Answer 15

Divergent Boundary

Question 16

vibration of Earth due to the rapid release of energy

Answer 16

Earthquake

Question 17

a break in a rock along which movement has occurred

Answer 17

Fault

Question 18

any break in a rock in which no significant movement has taken place

Answer 18

Fracture

Question 19

the science that studies Earth

Answer 19

Geology

Question 20

a concentration of heat in the mantle capable of creating magma

Answer 20

Hot spot

Question 21

a mass of molten rock formed at depth, including dissolved gases and crystals.

Answer 21

Magma

Question 22

a continuous mass of land with long width and height on the ocean floor.

Answer 22

Mid ocean ridge

Question 23

rigid sections of the lithosphere that move as a unit

Answer 23

Plates

Question 24

a theory which suggests that Earth’s crust is made up of plates that interact in various ways, thus producing earthquakes, mountains, volcanoes, and other geologic features

Answer 24

Plate Tectonics

Question 25

the first type of seismic wave to be recorded in a seismic station

Answer 25

Primary Wave

Question 26

consolidated mixture of minerals

Answer 26

Rocks

Question 27

second type of earthquake wave to be recorded in a seismic station

Answer 27

Secondary Wave

Question 28

a record made by a seismograph

Answer 28

Seismogram

Question 29

a device used to record earthquake waves

Answer 29

Seismograph

Question 30

an event in which a slab of rock thrusts into the mantle

Answer 30

Subduction

Question 31

The rigid, outermost shell of a rocky planet

Answer 31

Litosphere

Question 32

a boundary produced when two plates slide past each other

Answer 32

Transform Fault Boundary

Question 33

a depression in the seafloor produced by subduction process

Answer 33

Trench

Question 34

a chain of volcanoes that develop parallel to a trench

Answer 34

Volcanic Island Arc

Question 35

Destructive Boundary an actively deforming region where tectonic plates move toward one another and collide

Answer 35

Convergent Fault

Question 36

Constructive/extensional a linear feature that exists between two tectonic plates that are moving away from each other

Answer 36

Divergent Boundary

Question 37

The position where the strain energy stored in the rock is first released, marking the point where the fault begins to rupture

Answer 37

Focus

Question 38

____________ give rise to several geologic features and events.

Answer 38

Plate tectonics

Question 39

As a result of the motion of the plates, three types of plate boundaries were formed:

Answer 39

Divergent, Convergent, and Transform fault boundaries.

Question 40

Each plate is slowly but continuously _______.

Answer 40

Moving

Question 41

According to the plate tectonics model, the entire lithosphere of the Earth is broken into numerous segments called ______.

Answer 41

plates

Question 42

Latin word were tectonics came from

Answer 42

Tectonicus

Question 43

Pertaining to building

Answer 43

Tektovikos

Question 44

You were provided with data showing the arrival time of the P and
S-waves recorded from three seismic stations. Which of these can you possibly determine?

Answer 44

Location of the Epicenter