Unit 4 Flashcards
1
Q
Geology
A
study of Earth’s physical features, processes and history
2
Q
Earth has 3 main layers:
A
core, mantle, crust
3
Q
core
A
1/3 main layers in the earth
dense iron center
4
Q
mantle
A
rock surrounding the core
is split in to two main parts:
asthenosphere
lithosphere
5
Q
crust
A
thin, brittle, top layer
6
Q
center of core to top of crust
A
4,000 miles (3950-3963 miles)
7
Q
Asthenosphere
A
bottom portion of upper mantle
hot & weak
8
Q
“astheno”
A
weak
9
Q
Lithosphere
A
top portion of upper mantle plus entire crust layer
Cool & rigid
moves only over geologic time
10
Q
“lithos”
A
store
11
Q
A
