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