Sediments & Coastlines TEST

Front

What is a breakwater?

Back

A structure built offshore to protect the coast from wave action and erosion by breaking the waves before they reach the shore.

Front

What is the primary function of offshore breakwaters?

Back

To act as barriers to wave energy, reducing the impact on the shore and mitigating erosion.

Front

How do seawalls protect the coastline?

Back

By reflecting waves back out to sea, thereby reducing the energy that reaches the shore.

Front

What type of sediment are tektites classified as?

Back

Cosmogenous sediment, which originates from extraterrestrial sources.

Front

True or False: Clay will travel farther out into the ocean than sand will.

Back

True, because clay particles are smaller and can be carried further by water.

Front

What is the difference between lithogenous and biogenous sediments?

Back

Lithogenous sediments are derived from the weathering of rocks, while biogenous sediments are formed from the remains of living organisms.

Front

What role do groins play in coastal management?

Back

Groins are structures built perpendicular to the shoreline to trap sand and prevent beach erosion.

Front

Define hydrogenous sediment.

Back

Sediment that forms from the precipitation of minerals from seawater, often due to chemical reactions.

Front

What is the purpose of constructing seawalls?

Back

To protect coastal areas from erosion and flooding caused by storm surges and high waves.

Front

What are the environmental impacts of building breakwaters?

Back

They can alter local ecosystems, affect sediment transport, and change wave patterns.