What is a flat bench like surface cut in rock along a coast?
A flat, bench-like surface cut in rock along a coast is a. Wave-cut platform.
What structure is built to protect boats from large breaking waves?
Breakwaters are structures used to protect boats from large waves (jetties and groins are forms of breakwaters).
Which one of the following would indicate that the land has been lifted or that sea level had fallen?
Science 101 Final
| Question | Answer |
|---|---|
| The presence of which one of the following would indicate that the land had been uplifted or that sea level had fallen? | elevated marine terrace |
| The movement of sand parallel to the shore ________. | all of these |
Which of the following structures is built off shore to reduce erosion from large breaking waves?
Submerged breakwaters Submerged breakwaters are built to reduce beach erosion. These may also be referred to as artificial "reefs." A breakwater can be offshore, underwater or connected to the land. As with groins and jetties, when the longshore current is interrupted, a breakwater will dramatically change the profile of the beach.
What is a fetch quizlet?
The fetch refers to. The distance over which the wind blows without interruption. The time between two successive waves is called the. period.
What is the wave base quizlet?
wave base. the level of the water surface equivalent to one half the wavelength where wave-induced motion is absent. shallow water waves. a wave that is influenced by the sea bottom, usually in water that is shallower than 1/20 its wave length. constructive wave interference.
What is a breakwater and what is it used for?
A breakwater is an offshore shore-parallel structure that “breaks” waves, reducing the wave energy reaching the beach and fostering sediment accretion between the beach and the breakwater.
Which of the following coastal engineering structures is built parallel to the shoreline?
Seawalls and revetments are types of coastal engineering structures that run parallel to the shoreline. Also known as “armoring” or “hard structures,” coastal engineering structures provide a physical barrier that directly protects inland areas.
Which of the following is a landform created by wave erosion *?
Science Chapter 9-Oceans
| Question | Answer |
|---|---|
| The movement of sand parallel to the shore | all of these |
| Which one of the following is a landform created by wave erosion? | sea arch |
| A ridge of sand projecting into a bay and often having a hooked end is a | spit |
| The movement of sand parallel to the shore | all of these |
Which one of the following is a landform created by a wave erosion?
1 Answer. Sea cliffs and terraces, sea stacks and caves.
What are groynes used for?
A groyne is a shore protection structure built perpendicular to the shoreline of the coast (or river), over the beach and into the shoreface (the area between the nearshore region and the inner continental shelf), to reduce longshore drift and trap sediments.
What is erosion beach?
Erosion on a beach occurs when sand is moved from one location to another It is a natural process Sand is not lost from the beach it is simply moved to. another location to balance the energy that impacts the coast
What is the fetch geology quizlet?
Fetch is the distance the wind blows over a continuous water surface. Waves in the ocean have a larger fetch than waves in lakes and ponds.
What is a fetch wave?
Wave height is affected by wind speed, wind duration (or how long the wind blows), and fetch, which is the distance over water that the wind blows in a single direction.
What is the movement of sand along the beach called?
beach drift Consequently, beach sand will have a net movement up or down the beach, depending on the direction of incoming waves. This net movement of the beach sand is known as beach drift.
What is a tsunami quizlet?
A tsunami is a long high sea wave caused by an earthquake, submarine landslide, or other disturbances. As a tsunami nears the coastline, it may rise to several feet, and can cause great loss of life and property damage when it comes ashore.
What is a breakwater called?
(ˈbreɪkˌwɔːtə ) or breakwall (ˈbreɪkˌwɔːl ) noun. 1. Also called: mole. a massive wall built out into the sea to protect a shore or harbour from the force of waves.
What are breakwaters on beaches?
A breakwater is an offshore shore-parallel structure that “breaks” waves, reducing the wave energy reaching the beach and fostering sediment accretion between the beach and the breakwater.
What are coastal engineering structures?
Coastal engineering structures built out into the water from the shore (such as groins) block the natural littoral drift of sand prevailing along most coasts. This deprives beaches of sand and initiates erosion on the downdrift side of the structure, while sand deposits updrift where the beach advances seaward.
What are jetties and groins?
Typically, jetties are concrete or rock structures built at inlets and channels in order to maintain channels for shipping and navigation. A groin is built perpendicular to the coast and works similar to the way a jetty works.
Which is a coastal feature formed by wave erosion?
Sea cliffs Their vertical nature is the result of wave-induced erosion near sea level and the subsequent collapse of rocks at higher elevation. Cliffs that extend to the shoreline commonly have a notch cut into them where waves have battered the bedrock surface.
How are coastal landforms formed by erosion?
Coastal processes of erosion include hydraulic action, attrition, corrosion and solution. Landforms created by erosion include headlands and bays, caves, arches, stacks and stumps. Longshore drift is a method of coastal transport.
How coastal landforms are formed?
Coastal landforms are the landforms along the coastline that are mostly formed by erosion and sediments from waves, longshore currents, rip currents, tides, and climatic factors like wind and rainfall, and temperature include headlands, cliffs, bays, spits, salt marshes, and beaches.
What is a rock groyne?
A groyne functions as a physical barrier by intercepting sand moving along the shore. Sand is gradually trapped against the updrift side of the structure, resulting in a wider beach on this “supply-side” of the structure. However the downdrift beach is deprived of the sand trapped by the groyne and therefore it erodes.
What is groynes or Spurs?
Groynes or spurs: Structures constructed transverse to the river flow extending from the bank into the river. Can be aligned either perpendicular to the bank or at an angle pointing d/s or u/s. Also known as spur dike or transverse dikes and constitute the most widely used river training works.
What is coastal erosion in geography?
Coastal erosion (or shoreline retreat) is the loss of coastal lands due to the net removal of sediments or bedrock from the shoreline. Coastal erosion can be either a: rapid-onset hazard (occurs very quickly, a period of days to weeks)
How do beaches form for kids?
A beach forms when waves deposit sand and gravel along the shoreline. and pebbles. Over time they are worn smooth from being rolled around by waves. The rocks usually reflect the local geology.
What is fetch oceanography?
Fetch. 1. The area in which ocean waves are generated by the wind. Also refers to the length of the fetch area, measured in the direction of the wind. 2.
What does fetch refer to in terms of ocean waves quizlet?
what does fetch refer to in terms of ocean waves. the distance that wind blows over open water.
Which are surface waves?
In physics, a surface wave is a mechanical wave that propagates along the interface between differing media. A common example is gravity waves along the surface of liquids, such as ocean waves.