APES - Ch 1 The Earth Flashcards
0
Q
Relative Time Scale
A
-based on sequence of rocks
1
Q
Radiometric Time Scale
A
-based on radioactivity of chemical elements in rocks
2
Q
Precambrian Era
A
-characterized by primitive marine life
3
Q
Paleozoic Era
A
- abundant life
- vertebrates and invertebrates
- amphibians and reptiles
4
Q
Mesozoic Era
A
-birds and dinosaurs
5
Q
Cenozoic Era
A
-age of man
6
Q
Continental Crust
A
- made of granite
- less dense than oceanic crust
7
Q
Oceanic Crust
A
- made of basalt
- much denser than continental crust
8
Q
Mohorovicic Discontinuity (Moho)
A
-layer between crust and mantle
9
Q
Asthenosphere
A
-liquid part of mantle
10
Q
Continental Drift Theory
A
-continents used to be one (Pangaea)
11
Q
Seafloor Spreading
A
-newest rock found at center of Atlantic
12
Q
Lithosphere
A
-the crust and upper mantle
13
Q
Transform Boundary
A
- plates slide past each other
- San Andreas Fault
14
Q
Divergent Boundary
A
- plates spread apart
- Mid-Atlantic Ridge
