(3) Layers of the Earth

Question 1

how many diff main layers of the earth are there and what are they

Answer 1

crust mantle outer core inner core

Question 2

crust

Answer 2

uppermost part of the earth

Question 3

how many types of crust are there and what are they

Answer 3

2 – continental and oceanic

Question 4

continental crust

Answer 4

crust that is felsic and fatter that oceanic crust

Question 5

oceanic crust

Answer 5

crust that is mafic and skinnier than continental crust

Question 6

felsic

Answer 6

rich in Si

Question 7

magic

Answer 7

rich in Fe or Mg

Question 8

what is more dense oceanic or continental crust

Answer 8

oceanic

Question 9

subduction

Answer 9

a process in which oceanic crust slides underneath the continental crust and into the mantle until it reaches the bottom of the mantle and gets destroyed cuz its denser than continental crust

Question 10

what is older continental or oceanic crust

Answer 10

continental bc oceanic keeps getting destroyed

Question 11

mantle

Answer 11

super hot and high (higher than atmosphere) pressured solid and malleable layer under the crust

Question 12

lithosphere

Answer 12

crust and uppermost part of the mantle

Question 13

primordial heat

Answer 13

heat generated during the initial formation of earth

Question 14

radiogenic heat

Answer 14

heat generated by the decay of radioactive nuclides

Question 15

what forms in areas of hot upwelling mantle

Answer 15

mid ocean ridges and rift zones

Question 16

what forms in areas of cold sinking mantle

Answer 16

subduction zones

Question 17

slab pull force

Answer 17

the main force behind subduction in which the subducting slab gets pulled in faster bc ut gets more dense than the surrounding mantle

Question 18

what is the main cause of plate tectonics

Answer 18

slab pull force

Question 19

mantle is mainly made of

Answer 19

peridotite

Question 20

xenolith

Answer 20

weird rocks

Question 21

D” layer

Answer 21

layer at the bottom of the mantle that has a very high thermal gradient and increased heterogeneity

Question 22

mantle plums

Answer 22

cylindrical areas of hot rising mantle that cause volcano erruptions

Question 23

outer core

Answer 23

liquid thing that’s super hot and made of iron and nickel and has super high pressure and ALS ocean convect heat from the mantle super well

Question 24

geodynamo

Answer 24

the process in which earth maintains its magnetic field when iton swirls through earths magnetic field and creates an additional magnetic field for the earth to strengthen the og one

Question 25

inner core

Answer 25

temp is equal to the sun; doesn’t have a magnetic field but stabilizes earths magnetic field; solid bc of super high temp

Question 26

what layer of the earth creates magnetic field

Answer 26

outer core

Question 27

super rotation

Answer 27

inner core moves faster than earth