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