Barrier Islands and Longshore Currents

The video explains barrier islands, which are long, narrow islands parallel to the mainland, separated by water bodies like lagoons or sounds. These islands form from sediment transported by waves and currents, protecting the mainland from erosion and storm surges. Longshore currents, created by waves striking the beach at angles, play a crucial role in transporting materials that form these islands. Padre Island in Texas is highlighted as the world's longest barrier island. The video concludes with a reminder to practice kindness.

What is a barrier island?

• A mountain range parallel to the coast

• A long, narrow island parallel to the mainland

• A deep ocean trench

• A type of coral reef

What separates a barrier island from the mainland?

• A desert

• A forest

• A body of water like a lagoon or sound

• A mountain range

How do barrier islands protect the mainland?

• By blocking sunlight

• By attracting tourists

• By providing fresh water

• By preventing erosion and storm surges

What materials are transported by waves to form barrier islands?

• Lava and volcanic ash

• Ice, snow, and glaciers

• Leaves and branches

• Sand, rock, dead corals, and shells

What causes longshore currents?

• The gravitational pull of the moon

• The angle at which waves strike the beach

• The rotation of the Earth

• The presence of marine life

What can longshore currents create over time?

• Coral reefs

• Mountain ranges

• Barrier islands

• Deep sea trenches

Which is the longest barrier island in the world?

• Long Island, New York

• Padre Island, Texas

• Martha's Vineyard, Massachusetts

• Galveston Island, Texas