Evidence of Geologic Processes Over Time
These are long, zipper-like chains of undersea mountains.
Mid-ocean ridges
Any preserved remains, impression, or trace of any once-living thing from a past geological age.
Fossil
What does the term "tectonic" refer to?
Earth's Crust
This law states that in an undisturbed horizontal rock layer, the oldest layer is at the bottom and the youngest layer is at the top.
Law of Superposition
This is the removal of forests, which destroys animal habitats.
Deforestation
What kind of activity is related to mid-ocean ridges.
Volcanic
When molten rock flows up through a crack in Earth’s crust and hardens in to solid strips of new rock.
Seafloor Spreading
What causes the tectonic plates to move?
Convection currents in the mantle
Geologic record
This builds towns, requires moving in large amounts of materials, and often involves changing the land like draining swamps.
Urbanization
This scientist is credited with creating the hypothesis of continental drift.
Alfred Wegener
The quality or fact of being the same.
Uniformity
The asthenosphere
This is the age of a rock compared to the ages of other rocks.
Relative Age
This is the process where fertile land becomes a desert because it loses moisture and nutrients.
Desertification
Is new crust more or less dense than older crust.
Less
The introduction of contaminants into the natural environment that cause harm
Pollution
These types of boundaries cause frequent earthquakes without any volcanic activity.
Transform boundaries
Strata
These are harmful emission from factories and cars that get released into the air.
Air Pollution
This is the process where parts of the ocean floor are sinking back into Earth's mantle.
Subduction
A physical property that indicates how much matter is packed into a given space.
Density
This type of boundary causes volcanic activity and shallow earthquakes.
Divergent boundary
This is a gap in the geologic record where rock layers have been lost due to erosion.
Unconformity
Managing forests responsibly, and setting aside land as parks to protect wildlife and ecosystems are both examples of what positive human impact?
Preservation