Chap. 2

Question 1

The 2 parts of an earthquake are

Answer 1

1. surface waves 2. body waves

Question 2

P waves

Answer 2

Compressional, first to arrive, move through solid liquid and gas

Question 3

S wave

Answer 3

Shear, second to arrive, Solid

Question 4

P wave shadow zones

Answer 4

104-140

Question 5

S wave shadow zones

Answer 5

104-180

Question 6

Model 1

Answer 6

Core, Mantle, Crust (1. continental 2. Oceanic)

Question 7

Model 2

Answer 7

Lithosphere, Asthenosphere, Mesosphere, Outer Core, Inner Core

Question 8

Lithosphere

Answer 8

Crust and upper mantle fused together

Question 9

Asthenosphere

Answer 9

Deformable region in the mantle

Question 10

Mesosphere

Answer 10

Solid lower mantle

Question 11

Isostasy

Answer 11

buoyant support of lithosphere by asthenosphere

Question 12

Moho

Answer 12

Layer between crust and mantle

Question 13

Alfred Wagener

Answer 13

proposed the continental drift theory

Question 14

Supercontinent

Answer 14

Pangaea

Question 15

Single ocean

Answer 15

Panthalassa

Question 16

Pangea break-up

Answer 16

200-250 million years ago

Question 17

Pangea split to make

Answer 17

Laurasia and Gond

Question 18

Wegeners evidence

Answer 18

Fit on continents
fossil distribution
ancient mountain belt 
matching rocks
patterns of glaciation

Question 19

Harry Hess

Answer 19

Mantle convection (slab push & pull)

Question 20

Subduction Zones

Answer 20

earthquakes
volcanoes
island Arc

Question 21

Benioff Zone

Answer 21

Large & Deep earthquakes

Question 22

subduction zone evidence

Answer 22

distribution of EQ epicenter
heat flow
sediment age & thickness
paleomagnetism

Question 23

Paleomagnetism

Answer 23

Reversal of magnetic poles

magnetic stripes

Question 24

Rift

Answer 24

sea floor spreading

Question 25

Divergent

Answer 25

two Plates moving apart (mid-oceanic ridge)

Question 26

Convergent

Answer 26

two plates moving together, one sinks under another (mantel)

Question 27

Transform

Answer 27

two plates move in different directions parallel with each other

Question 28

plate tectonic stages

Answer 28

up warping Rift Valley Linear Sea Mid-ocean ridge

Question 29

Convection

Answer 29

driven by heat in mantle

Question 30

Rate of motion

Answer 30

1-20 cm/yr

Question 31

Hotspots

Answer 31

where you have a volcano, then volcanic island, then seamount, then Guyot

Question 32

Wilson Cycle

Answer 32

``` Initial continent Rifting ocean basin subduction closing ocean basin collision new continent ```