1Physical Geology
the area of geology that studies materials composing earth and it's systems
2Historical Geology
the study of geology that concerns earth's origins and development through time
3Catastrophism
the idea that earth's landscapes were shaped primarily by great catastrophes
4Uniformitarianism
the idea that the physical, chemical, and biological processes that operate today also operates in the geologic past
5Earth's four Major Spheres
Lithosphere, Hydrosphere, Biosphere, Atmosphere
6Geologic Hazards
volcanoes, earthquakes, floods, tsunamis, landslides
7earth's age
4.6 billion years
8What is a system?
a group of Interacting or independent parts that form a complex whole
9what are earth's major systems?
atmosphere, biosphere, hydrosphere, geosphere
10atmosphere
a thin blanket of gas that provides air and protects from the sun. produces weather and climate
11hydrosphere
dynamic mass of wateron earth's surface. covers 71% of the surface. primarily comprised of saltwater
12 biosphere
all life on earth
13geosphere
the solid earth. comprised of soil and rock
14the universe began
13.7 million years ago
15Earth's layered Structure is due to
density and buoyancy
16Nebular Theory
the bodies of our solar system have evolved from an enormous rotating cloud called a solar nebula.
17The inner planets of the solar system
- neptune
- saturn
- mars
- jupiter
- uranus
- mercury
- venus
- earth
18continental margin
portion of the seafloor adjacent to landmasses
19continental shelf
a flooded extension of the continents
20continental slopes
the boundary between continents and deep ocean basins
21continental rise
a thick wedge of sediment that moved downslope from the continental shelf and accumulated on the deep-ocean floor.
22deep ocean basins
between continental margins and oceanic ridges
23abyssal plains
flat parts of basins
24deep ocean trenches
extremely deep depressions that are more than 11,000 ft
25seamounts
submerged volcanic structures