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