PS 102 Week 1 Earth's Interior

In general Earth's Internal Heat engine is a result of compaction and radioactive decay

true

Isostasy is a geophysical field of research used to study the earth's interior

true

The earth is divided into 3 basic regimes, core, mantle crust

true

The earth's mantle (in Total) is composed of 95% non-sedimentary rocks (material) which are dominantly siliceous

true

knowledge of the earth's interior is never derived from actual rock samples

true

the earth (in total) is composed of 95% melted, non-sedimentary rocks

true

Considering Earth's Core, the outer core is considered to be a liquid, (mostly Ni-nickle), yet the inner core exists as a solid due to an increase in pressure toward the center which causes the material (mostly Ni - nickle) to solidify

false

The Earth's core (in Total) is composed of 95% weathered sedimentary rocks

false

magnetic flowage is believed to take place within the portion of the earth termed the "crust"

false

the earth's internal heat engine works due to convection, because cool dense material deep within the earth moves swiftly upward toward the earth's surface and hotter, buoyant material moves downward in a type of convection current

false

Instructional Objectives

recall the process of differentiation that resulted in the earth's core, mantle and crust. define what constitutes the earth's core, mantle and crust, its subdivisions and their defining specifics. explain the basics of the science of geophysics and why it is important to the study of the earth's interior differentiate P-waves, S-waves and L-waves. paraphrase the Theory of Isostacy. describe how the earth's magnetism relates to the earth's interior. re-state what is the earth's Internal Heat Engine. describe divergent and convergent boundaries and how they relate to Plate Tectonics and Mantle convection.