Earth's 3 Layers

Question 1

What are the Earth’s three layers?

Answer 1

Crust, Mantle, and Core

Question 2

It is thin and the topmost layer of the Earth.

Answer 2

Crust

Question 3

What is the uppermost layer who’s name is derived from the first two letters of the two most abundant elements found in it?

Answer 3

Sial (Silicon Aluminum)

Question 4

What is the lower crust made up of mostly of Silicon and Magnesium?

Answer 4

Sima

Question 5

What are the Earth’s thin, rocky crust’s two different types?

Answer 5

Continental and Oceanic Crust

Question 6

What crust is composed of granitic rock?

Answer 6

Continental Crust

Question 7

What crust is composed of dark igneous rock basalt?

Answer 7

Oceanic Crust

Question 8

Separating the crust and the Earth’s second layer is the boundary called _________?

Answer 8

“MOHOROVICIC DISCONTINUITY”

Question 9

Who discovered the Mohorovicic Discontinuity in 1909?

Answer 9

a Croatian scientist named Andrija Mohorovicic

Question 10

What layer compromises 82% of the Earth’s volume?

Answer 10

Mantle

Question 11

What mantle is made up of solid rocks and together with crust known as lithosphere?

Answer 11

Upper Mantle

Question 12

What mantle is the weaker region of semi-solid or plastic known as asthenosphere?

Answer 12

Lower Mantle

Question 13

Marking the boundary between the solid mantle and the Earth’s third layer is the _______?

Answer 13

“GUTENBERG DISCONTINUITY”

Question 14

Who discovered the Gutenberg Discontinuity?

Answer 14

a German seismologists named Beno Gutenberg

Question 15

What composition is an iron-nickel alloy with minor amounts of oxygen, silicon, and sulfur elements that readily form compounds with iron?

Answer 15

Core

Question 16

What are the cores two regions?

Answer 16

Outer and Inner Core