Plate Tectonics

Question 1

What are the 3 main elements?

Answer 1

1. uranium
2. potassium
3. thorium

Question 2

what are the 3 layers?

Answer 2

1. inner and outer core
2. mantle
3. 2 types of crust

Question 3

What is the core?

Answer 3

• primarily iron and nickel
• creates earths magnetic field

Question 4

WHat is the mantle?

Answer 4

• dense layer of primarily rock
• convection occurring up to 15cm
• 2900 km thick

Question 5

what is the lithosphere

Answer 5

• what makes up tectonic plates
• brittle

Question 6

what is asthenosphere

Answer 6

-upper layer of mantle that behaves plastically

Question 7

what is ocean crust

Answer 7

thin yet dense
jurassic age

Question 8

what is moho

Answer 8

where continental crust hits ocean crust on top of the mantle

Question 9

3 types of plate boundaries

Answer 9

1. divergent
2. convergent
3. transform

Question 10

divergent plate boundary

Answer 10

moving away from eachother

Question 11

convergent plate boundary

Answer 11

moving into eachother

Question 12

transform plate boundary

Answer 12

move horizontally passing each other

Question 13

ocean-continent convergence

Answer 13

• ocean crust meeting continental crust

Question 14

continent-to-continent convergence

Answer 14

-continental crusts meeting

Question 15

what drives plate tectonics?

Answer 15

• ridge push
• slap rull
• convection

Question 16

types of fault lines

Answer 16

1. normal
2. reverse
3. strike-slip

Question 17

normal fault line

Answer 17

rocks above the fault plane move down relative to the rocks below the fault plane

Question 18

reverse fault line

Answer 18

hanging wall moves up relative to the footwall

Question 19

types of dip slip faults

Answer 19

normal and reverse

Question 20

strike slip fault

Answer 20

rocks on either side of a nearly vertical vault plane moves horizonal

Question 21

dexteral

Answer 21

right lateral

Question 22

sinistral

Answer 22

left lateral

Question 23

strike

Answer 23

• imaginary horizonal line on the surface
• parallel to the fault
• measure bearing of that line from the north
• 0 to 360 degrees

Question 24

dip direction

Answer 24

-perpendicular to the strike
- measured from horizontal
- 0-90 degrees

Question 25

scarp height

Answer 25

height (peak elevation minus base elevation)

Question 26

strain motion

Answer 26

1. shear
2. extensional
3. compressive

Question 27

shear

Answer 27

happens at transform boundaries where 2 plates sliding past eachother

Question 28

extensional

Answer 28

happens at divergent boundaries 2 plates moving away from each other

Question 29

compressive

Answer 29

convergent boundaries 2 plates moving toward eachother