Ch. 18 Quiz Flashcards
Deflation is a form of ___.
wind erosion
Mounds of wind-deposited sand are called ___.
dunes
the process by which wind-blown sand moves by short jumps and bounces
saltation
the movement of dunes
dune migration
any rock that is pitted, grooved, or polished by wind abrasion
ventifact
a sand ridge that connects an offshore island to the mainland
tombolo
Beaches are formed by ___.
deposition
Why is a berm high and steep during winter?
Because storms remove sand from one side of the berm.
Erosion of less-resistant rock can form ___ which project out from the shore.
headlands
What does the composition of beach material depend on?
the source/parent rock
a long narrow sand deposit connected at one end to a shore
spit
a hole cut into fractured, weak rock along a cliff base
sea cave
What would happen if polar ice caps melted completely?
Sea level would rise.
What is a way that barrier islands can be formed?
when sand spits separate from land after a storm
A rise in sea level forms ___.
submergent coastlines
When land or features near the coast change, ___.
relative sea level changes
a wide, shallow bay where salt water and fresh water mix
estuary
a small body of water between the shoreline and a barrier island
lagoon
sand shaped as a straight ridge parallel to wind direction
longitudinal dune
a narrow, deep bay with steep walls
fiord
sand shaped as a crescent with an opening that faces away from the wind
barchan dune
a narrow ridge of sand that lies parallel to the shore
barrier island
sand shaped as a crescent with an opening that faces the wind
parabolic dune
sand shaped as a straight ridge that forms at a right angle to wind direction
transverse dune
type of coastline that forms when land rises or sea level falls
emergent coastline
