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