Layers of the Earth

Question 1

the outermost layer on the Earth

Answer 1

Crust

Question 2

less than 1% of Earth’s mass, 5-100 km thick

Answer 2

Crust

Question 3

thinnest layer of the Earth

Answer 3

Crust

Question 4

Composed of plates on which the continents and oceans rest. These “ride” over molten mantle

Answer 4

Crust

Question 5

made up of large amounts of silicon and aluminum

Answer 5

crust

Question 6

2 types of crust

Answer 6

Oceanic and Continental

Question 7

the thickness of Continental?

Answer 7

5-70km (thicker)

Question 8

the state of Continental?

Answer 8

Solid

Question 9

the crust age of Continental

Answer 9

4 billion years old or older

Question 10

the element composition of Continental?

Answer 10

Oxygen, sodium, silicon, aluminum, potassium

Question 11

the thickness of Oceanic?

Answer 11

3-8km (Thinner)

Question 12

the state of Oceanic?

Answer 12

Solid

Question 13

the crust age of Oceanic?

Answer 13

180 million years old or younger

Question 14

the element composition of Oceanic?

Answer 14

Iron, Magnesium, Calcium

Question 15

The crust and the upper layer of mantle together make up a zone of rigid, brittle rock called __________

Answer 15

Lithosphere

Question 16

The crust of the Earth is broken into many pieces called ______

Answer 16

plates

Question 17

The __________ divided into separate/tectonic plates which move very slowly in response to the _______ part of the mantle

Answer 17

Lithosphere / convecting

Question 18

The plates _________ on the soft, semi-rigid ___________.

Answer 18

float / asthenosphere

Question 19

67% of Earth’s mass, 2900 km thick (1800miles)

Answer 19

Mantle

Question 20

Solid but capable of flow (like fudge) Semi-Solid/Semi-Liquid

Answer 20

Mantle

Question 21

Thickest layer of the Earth

Answer 21

Mantle

Question 22

the element composition of Mantle?

Answer 22

Magnesium, silicon, oxygen and iron

Question 23

The hot magma rises then cools and sinks (cycle).These convection currents cause changes in the Earth’s surface.

Answer 23

Mantle

Question 24

Conveyor belt for the tectonic plates.

Answer 24

mantle

Question 25

It is the semi-rigid part of the middle mantle that flows like hot asphalt under a heavy weight.

Answer 25

Asthenosphere

Question 26

The asthenosphere (weak sphere) is a _________ layer of the mantle which pieces of lithosphere (plates) move, and it is made of _________.

Answer 26

soft / solid rock

Question 27

The middle mantle ________ because of __________.

Answer 27

flows / convection currents

Question 28

Convection currents are caused by the very _____ _______ at the deepest part of the mantle rising being less dense, then cooling becoming more dense and sinking again –repeating this cycle over and over.

Answer 28

hot material

Question 29

33% of Earth’s mass 6856km in diameter

Answer 29

Core

Question 30

What are the 2 layers of core?

Answer 30

inner and outer core

Question 31

___________ Crust is denser than _________ Crust.

Answer 31

Oceanic / Continental

Question 32

Main Rock Type of the 2 types of Crust?

Answer 32

Oceanic - basalt
Continental - granite

Question 33

between lower crust & upper mantle

Answer 33

Mohorovicc Discontinuity

Question 34

between upper & lower mantle

Answer 34

Repiti Discontinuity

Question 35

between lower mantle & outer core

Answer 35

Guttenberg Discontinuity

Question 36

between outer & inner core

Answer 36

Lehmann Discontinuity

Question 37

between upper & lower crust

Answer 37

Conorod Discontinuity