CH 25.3 25.4 Flashcards
1
Q
what is the boundary that marks a density change
A
discontinuity
2
Q
how can discontinuities be identified
A
seismic waves
3
Q
what is a shadow zone
A
is where no seismic waves have been recorded
4
Q
whats another name for the shadow zone
A
dead zone
5
Q
what are the degrees from an epicenter that shadow zones fall
A
105-140 degrees
6
Q
is the outer core a solid or a liquid
A
liquid
7
Q
is the inner core a solid or a liquid?why
A
solid due to the pressure
8
Q
what is the lithosphere
A
the crust and uppermost mantle
9
Q
what is the asthenoshpere
A
is a weaker, plastic like layer that the plates move on
10
Q
what metallic materials make up the core
A
iron and nickel
11
Q
what elements make up the mantle
A
calcium, aluminum, iron, and magnesium
