APES - Ch 1 The Earth Flashcards
(37 cards)
Relative Time Scale
-based on sequence of rocks
Radiometric Time Scale
-based on radioactivity of chemical elements in rocks
Precambrian Era
-characterized by primitive marine life
Paleozoic Era
- abundant life
- vertebrates and invertebrates
- amphibians and reptiles
Mesozoic Era
-birds and dinosaurs
Cenozoic Era
-age of man
Continental Crust
- made of granite
- less dense than oceanic crust
Oceanic Crust
- made of basalt
- much denser than continental crust
Mohorovicic Discontinuity (Moho)
-layer between crust and mantle
Asthenosphere
-liquid part of mantle
Continental Drift Theory
-continents used to be one (Pangaea)
Seafloor Spreading
-newest rock found at center of Atlantic
Lithosphere
-the crust and upper mantle
Transform Boundary
- plates slide past each other
- San Andreas Fault
Divergent Boundary
- plates spread apart
- Mid-Atlantic Ridge
Convergent Boundary
- plates come together
- Cascade Mountain Range
Focus
-where energy is released in an earthquake
Epicenter
-earth surface directly above the focus
Richter Scale
- logarithmic - every whole number is 10x increase in amplitude
- doesn’t measure energy
P-Waves
-travel within the earth
S-Waves
-travel on surface - are what cause damage
Angle of Incidence
-angle sunlight hits the earth
Albedo
-reflectivity of a surface
Parent Material
-the rock soil is made from
