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