L4 + L5 Vocab Exam 1

Question 1

Accretionary Prism

Answer 1

A wedge shaped mass of sediment and rock scrapped off the top of a downging plate and accrected onto the overriding plate at a convergent plate margin.

Question 2

Apparent Polar wander path

Answer 2

A path on the globe along which a magnetic pole appears to hve wandered over time.

Question 3

Curie Point

Answer 3

The temperature at which rocks and minerals lose their permanent magnetisation.

Question 4

Collison

Answer 4

The process of two buoyant pieces of the lithosphere coverging and squashing together.

Question 5

Contential Rift

Answer 5

A liner belt along which contential lithospher streches and pulls apart.

Question 6

Convection

Answer 6

Heat transfer that results when warmer, less dense material rises while cooler, denser material sinks.

Question 7

Convergent Boundary

Answer 7

A surface across which two plates move towards each other so that one plate sinks beneath the other.

Question 8

Dipole

Answer 8

A magnetic feild with a north and south pole like that of a bar magnet.

Question 9

Magnetic Feild

Answer 9

The region affected by the force emanating form a magnet

Question 10

Magnetic inclination

Answer 10

The angle between a magnetic needle free to pivot on a horizontal axis and a horizontal plane parallel to the Earth’s surface

Question 11

magnetic declination

Answer 11

The angle between the direction a compass needle points at a given location and the direction of true north.

Question 12

Paleomagnetism

Answer 12

The record of ancient magnetism pressured in rock

Question 13

Marine magnetic anomalies

Answer 13

Variation of strength of Earths magnetic Field caused by magnetism in rocks of the ocean floor.

Question 14

Normal polarity

Answer 14

Polarity in which the paleomagnetic dipole has the same orientation as it does today.

Question 15

Plate boundary

Answer 15

The border between two adjacent lithosphere plates

Question 16

Reversed polarity

Answer 16

Polarity in which the Paleomagnetic dipoles are opposite.

Question 17

Remanent magnetism

Answer 17

Magnetization left behind in a ferromagnetic material after an external magnetic field is removed.

Question 18

Accretionary prism

Answer 18

A wedge shaped mass of sediment and rock scraped off the top of an ongoing plate and accreted onto the overriding plate at a convergent plate margin.

Question 19

Collision

Answer 19

The process of two buoyant pieces of the lithosphere, converging and squishing together

Question 20

Continental rift

Answer 20

A linear belt along which continental lithosphere stretches and pulls apart

Question 21

Convection

Answer 21

Heat transfer that results when warmer less dense material, rises, while cooler denser material sinks.

Question 22

Convergent boundary

Answer 22

A surface across which two plates move toward each other, so that one plate sinks beneath the other.

Question 23

Divergent boundary

Answer 23

A boundary at which two lithosphere plates move apart from each other.

Question 24

Downwelling

Answer 24

The downward movement of a volume of moving material.

Question 25

Hotspot

Answer 25

A location at the base of the lithosphere, where temperatures can cause melting and igneous activity.

Question 26

Orogenic belt

Answer 26

A linear range of mountains

Question 27

Mantle plume

Answer 27

A column of very hot rock that rises up through the mantle

Question 28

Ridge push force

Answer 28

A process in which gravity causes the elevated lithosphere at a mid ocean ridge axis to push on the lithosphere.

Question 29

Slab pull force

Answer 29

The force that down going plates apply to oceanic lithosphere at a convergent margin.

Question 30

Suture

Answer 30

The contact defining the boundary of what were two separate crustal blocks prior to collision.

Question 31

Transform boundary

Answer 31

A boundary at which one lithosphere plates slips laterally past another.

Question 32

Triple Junction

Answer 32

A point where three lithosphere plate boundaries intersect.

Question 33

Upwelling

Answer 33

The upward flow of air or water 

Question 34

Wadati-Benioff Zone

Answer 34

A sloping band of seismicity defined by intermediate and deep focus earthquakes that occur in the downgoing slab of a convergent plate boundary.