Relacionar Columnas Waves, Currents & TidesVersión en línea 5th Grade Science Unit por Julie Copeland 1 What are inlets? 2 What is a barrier island? 3 What causes surface currents? 4 Current 5 What are tides? 6 Wave 7 How often do tides occur? 8 Trough 9 Crest 10 Wind 11 What are estuaries? The repeated movement of water up and down The highest part of a wave Pieces of land surrounded by water on all sides that protect the mainland. This occurs about twice a day. The movement of Earth and the force and direction of wind. Flowing streams of water that move along a curved path through the ocean in a specific direction The cause of most waves to form Water-filled spaces between barrier islands The lowest part of the wave The area where a river meets the ocean The regular rise and fall of the waters in oceans and seas.