Geodesy

Question 1

What types of crust are there?

Answer 1

Oceanic ( 0- 10, mainly silica and magnesium)

Continental ( 0-75, mainly silica and aluminum)

Question 2

Mantle fast facts:

Answer 2

Composed of mainly iron and magnesium
2900 km thick
Consists of;l
Lithosphere - immediately below Moho apart of crust
Asthenosphere- contains molten, always at or near melting point
Lower mantle - mostly silicon magnesium and oxygen
Upper mantle- olivine and pyroxene, calcium and aluminum

Question 3

Outer core fast facts

Answer 3

• liquid and made of nickel and iron
• earths magnetic field controlled by this
• transition space between outer core and mantle is called Gutenberg discontinuity

Question 4

Inner core

Answer 4

Made up of solid iron and a little nickel
Unattached to the mantle and is suspended in the molten outer core
Has extreme temperatures
Transition region between outer core and inner core is called Lehman discontinuity.

Question 5

What is geodesy

Answer 5

The study of the size and shape of the earth