Ocean Currents & Shorelines

What two factors cause currents? (Pick 2 answers)

• Density

• Temperature

• Wind

• Light

How many different gyres are there?

• 1

• 4

• 5

• 7

_______________ are flowing streams of water that move continually through the ocean in a specific direction.

• Carrots

• Breakers

• Currents

• Tides

Currents that occur at or near the surface of the ocean are called 

• Deep Currents
• Convection Currents
• Surface Currents
• Wave Currents

What causes surface currents north and south of the equator to move in different directions? 

• Gases in the ocean
• The rotation of the Earth
• Temperature differences
• Continental deflection

Which of the following is a factor that contributes to the shaping of shorelines?

• waves

• tides

• currents

• all of these

A longshore current is characterized by ___________.

• water that approaches the shore head on and washes directly back and forth across the beach.

• water that rises vertically at the shore and sinks as it washes further down the beach

• water that moves horizontally across the edge of the beach in a back and forth pattern

• water that approaches the shore at an angle and washes up and down the beach in a zigzag pattern

An outward extension of sand that develops as a result of longshore currents moving sand down a beach is known as a(n) ____________.

• baymouth bar

• spit

• barrier island

• groin

A landform that is completely surrounded by water and runs parallel to the mainland is known as a(n) ____________.

• baymouth bar

• spit

• barrier island

• groin

____________ is the process by which humans retrieve eroded sand from underwater and place it back on the shoreline.

• Beach nourishment

• Sediment retrieval

• Beach replenishment

• Shoreline nourishment