Geography Flashcards
KeyWords (35 cards)
Core
The central or innermost part of something:
Mantle
the layer of the Earth that lies between the crust and the core. It is the thickest layer, making up about 84% of the Earth’s volume
Magma
molten rock found beneath the Earth’s surface
Crust
outermost solid layer of the object. It’s like the skin of an apple, relatively thin compared to the other layers.
Plate
refers to a massive slab of solid rock that makes up the Earth’s lithosphere.
Plate Boundary
the location where two tectonic plates meet
Convection Currents
heat-driven cycles that occur in fluids (liquids and gases).
They are caused by differences in temperature and density.
Colliding boundary
a type of tectonic plate boundary where two tectonic plates move towards each other.
Plate Tectonics
the scientific theory that explains how Earth’s lithosphere (the rigid outer shell of the planet, including the crust and upper mantle) is broken into large tectonic plates.
These plates are in constant motion, slowly moving across the Earth’s surface over millions of years.
Separating boundary
a type of tectonic plate boundary where two tectonic plates move away from each other. This movement creates a gap between the plates, which is filled by magma rising from the Earth’s mantle. As the magma cools and solidifies, it forms new crust, expanding the ocean floor.
Sliding Boundary
a type of tectonic plate boundary where two tectonic plates slide past each other horizontally. This type of boundary is characterized by frequent earthquakes but does not result in the creation or destruction of crust.
Subduction
a geological process that occurs at convergent plate boundaries where one tectonic plate moves beneath another and sinks into the Earth’s mantle
Pangea
a supercontinent that existed about 300 million years ago. It was a single landmass that contained almost all of the Earth’s landmass
Continental Drift
the theory that the Earth’s continents were once joined together in a single landmass called Pangaea.
Over millions of years, this supercontinent began to break apart and drift to their current positions.
fold mountain
a mountain that forms when two tectonic plates collide, causing the Earth’s crust to buckle and fold. This process, known as orogenesis, results in the formation of large mountain ranges.
Anticline
a type of fold in rock layers that forms an arch-like shape. It is characterized by its oldest rock layers being located at its core or center. The limbs of the fold, or the sides, dip away from the central axis.
Syncline
geological fold that forms a trough-like s
hape. In a syncline, the youngest rock layers are found at the center of the fold, while the oldest layers are located on the outer edges. The limbs of the fold, or the sides, dip towards the center.
Alpine
anything related to mountains, especially the Alps. It often implies high altitudes, cold climates, and specific plant and animal life adapted to these conditions.
Armorican
related to the ancient region of Armorica, which roughly corresponds to modern-day Brittany in northwestern France.
Caledonian
a geological period or to geological features associated with that period. The Caledonian orogeny was a major mountain-building event that occurred during the Paleozoic Era, approximately 420 to 360 million years ago.
Settlement
a settlement can be thought of as a colony or a nesting site. These terms describe a group of animals living or breeding together in a specific location.
Habitat
the natural environment where an organism lives. It provides the specific conditions necessary for the organism’s survival and reproduction. A habitat includes all the physical and biological factors that influence an organism,
Earthquake
a sudden shaking of the ground caused by the release of energy in the Earth’s crust. This energy release often occurs along fault lines, where tectonic plates move and interact. The point underground where the earthquake starts is called the focus or hypocenter, and the point directly above it on the surface is the epicenter
Focus
The point underground where an earthquake starts: The point of origin of seismic waves.