Chapter 1: Physical Processes Flashcards
The study of the distribution of phenomena on the Earth’s surface
geography
The study of the Earth’s crust and the processes that operate on it
geology
Large, fragmented slabs of the Earth’s crust
tectonic plates
Movement of the lighter continental plates atop heated magma
continental drift
Occurs when heavier crustal material is pushed under lighter crustal material
subduction
The uplift of the continental material by pressure from the mantle
isostatic readjustment
Solid, 1% of Earth’s mass
crust
Liquid, 10% of Earth’s mass, 4700F
outer core
Solid, 5% of Earth’s mass, 7600F
inner core
Flowing solid, 84% of Earth’s mass, 3800F
mantle
Saturated oceanic crust forces water into the mantle during subduction, facilitating melting and thereby keeping the mantle fluid
plate convergence
When two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust.
Plate divergence
The supercontinent that existed during the Paleozoic and Mesozoic eras approximately 250 million years ago
Pangaea
The northern super landmass comprising Asia and North America
Laurasia
The southern super landmass comprising Africa, South America, Australia, and Antarctica
Gondwana
The super ocean that became the Pacific Ocean with the breakup of Pangaea
Panthalassa
The large structural deformation of the crust during plate interaction that leads to mountain building
Orogeny
List the four types of volcanoes
- shield
- ash-cinder
- composite/stratovolcano
- caldera
Type of fault that is caused by tension at a high angle
normal fault
A type of fault that is caused by compression at a high angle
reverse fault
A type of fault that places older rocks above younger rocks at a shallow angle, uses compression
thrust fault
A type of fault caused by lateral movement
strike-slip fault
The means of measuring earthquake magnitude
Richter scale
The breakdown of either natural or man-made surface material
weathering