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