Coastal v. Stream Erosion

The groin structure will change the pattern of deposition along the shoreline, initially causing the beach to become:

• wider on the western side of the groin

• wider on the eastern side of the groin

• narrower on both sides of the groin

• wider on both sides of the groin

When the velocity of a stream suddenly decreases, the sediment being transported undergoes an increase in:

• A) particle density

• B) erosion

• C) deposition

• D) mass movement

Which agent of erosion is primarily responsible for the formation of the barrier islands along the south shoreline of Long Island, New York?

• wave action

• wind

• glacial ice

• mass movement

The map below shows barrier islands in the ocean along the coast of Texas. Which agent of erosion most likely formed these barrier islands?

• mass movement

• wave action

• streams

• glaciers

The map below shows some features along an ocean shoreline. In which general direction is the sand being moved along this shoreline by ocean (long-shore) currents?

• northeast

• southeast

• northwest

• southwest

The map below shows the large delta that formed as the Mississippi River emptied into the Gulf of Mexico. Which process was primarily responsible for the formation of the delta?

• glacial erosion

• cementation of sediment

• deposition of sediment

• mass movement

What is the approximate minimum stream velocity required to transport the smallest particles of sand?

• 1.0 cm/s

• 0.7 cm/s

• 0.3 cm/s

• 0.1 cm/s

Where is the most deposition likely to occur?

• on the side of a sand dune facing the wind

• at the mouth of a river, where it enters an ocean

• at a site where glacial ice scrapes bedrock

• at the top of a steep slope in a streambed

Which particles will be transported by a stream moving at a velocity of 5 cm/s?

• pebbles, sand, silt, and clay, only

• sand, silt, and clay, only

• silt and clay, only

• clay, only

Which two factors will increase the rate of a stream's flow?

• decreased precipitation and decreased slope

• decreased precipitation and increased slope

• increased precipitation and decreased slope

• increased precipitation and increased slope