Waves, Currents, Tides Review Contrast Orbital Waves, Longitudinal waves, and Transverse Waves by drawing diagrams including arrows to demonstrate movement of medium and wave. Draw a wave and label the wave height, crest, trough, and wave length. A wave has an period of 4, what is the frequency? A wave has a frequency of 2, what is the period? If you were trying to relay a message, what medium (ocean water or air) would enable the message to travel faster? Draw the difference between what happens during an ebbing tide and a flooding tide. Draw a diagram of what causes a neap tide and a spring tide. What is the difference between a diurnal and a semidiurnal tide pattern? What has the greatest effect on tides? If you were a water droplet in the ocean, how would you move differently in the Northern Hemisphere as compared to the Southern Hemisphere? (hint: coriolis effect) How do salinity and temperature affect density? How would you describe the topography of an area with a large tidal range? What drives deep water currents? What drives surface water currents?