7.2.2

Match each beach section with its description.

• backshore

• This region is usually above water.

• dunes

• Water covers and uncovers this region.

• offshore

• This region consists of small sand hills.

• foreshore

• This region stays underwater.

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NGSS.MS-ESS2-4

NGSS.MS-LS2-3

Water flows ​ (a)   toward a beach but flows ​ (b)   back from the beach. The resulting ​ (c)   motion along the shoreline is called the ​ (d)   current. This current is responsible for moving sediment along the beach in one direction.

• at an angle
• straight
• zigzag
• longshore
• circular
• linear
• offshore
• low-tide
• high-tide

Which of the following contribute to the shrinking of a beach? Select all correct answers, including those that also contribute to beach growth.

• motion of sand into dunes

• sediment from rivers

• the longshore current

• sediment from cliff erosion

• sediment carried into deep water

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NGSS.MS-ESS2-2

match the coastal landform with its description.

• Cave

• When waves strike rock along a coastline, they erode the base of the rock. An overhang is produced. As the waves continue to erode the base, a _________ is formed.

• Seastack

• Rock that projects out from the shore is called a headland. Waves may cut through a headland completely, producing a sea arch.

• Arch

• 
  Rock may become disconnected from a sea cliff or headland, such as when the top of a sea arch breaks. Such an offshore column of rock is called a _____________.

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NGSS.MS-ESS2-2

Match the depositional feature with its description.

• Barrier Island

• Thin stretches of land that run parallel to the shoreline and can change form based on wind and wave energy.

• Tombolo

• Deposition can produce a narrow piece of land that connects a barrier island or sand spit with the mainland.

• Sand Bar

• Over time, a sand spit may extend across an open body of water, such as a bay.

• Sand Spit

• A ______________________ is connected to the mainland at one end. They often form at the entrances to bays.

Which are the main factors in the formation of erosional and depositional features? Select all that apply.

• force of the waves

• direction of the windresistance of the rock to erosion

• temperature of the air/water

• shape of the shoreline

• direction and strength of the longshore current

Explain how erosional coastal landforms such as sea cliffs are formed.

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Understanding

The process by which sediment is carried by a longshore current and deposited as a straight extension from the shoreline is known as a sand ___.

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Applying

Describe the factors that influence the rate of erosion of sea cliffs.

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