Structure of the earth

Question 1

What is the earth made up of?

Answer 1

layers:

core,mantle, and crust

Question 2

Describe the core:

Answer 2

innermost layer of earth

divided into inner and outer core

Question 3

Describe the inner core:

Answer 3

at center of earth
hottest part of earth
made of iron and nickel

Question 4

Describe the outer core:

Answer 4

surrounds inner core
liquid layer
made of iron and nickel
temperatures similar to inner core

Question 5

Describe the mantle:

Answer 5

between crust and core

made of upper and lower mantle

Question 6

Describe the upper mantle:

Answer 6

semi-molten

minerals rich in iron silica magnesium and oxygen

Question 7

Describe the lower mantle:

Answer 7

solid

minerals rich in iron magnesium silica and oxygen

Question 8

Describe the crust:

Answer 8

variable thickness

oceanic and continental crust

Question 9

Describe the oceanic crust:

Answer 9

denser that continental crust
made of igneous rock
rich in iron and magnesium
forms surface of ocean basin

Question 10

Describe the continental crust:

Answer 10

thicker but less dense than oceanic crust
made of granite rock rich in feldspar with quartz and silica
forms surface of continents and shallow seabed near shores