21 Types of Tides Continued Diurnal Tides1 high & 1 low / dayParts of Gulf of Mexico and AsiaSemi-Diurnal Tides2 high & 2 low / dayAtlantic coasts of North America and EuropeMixed2 high & 2 low / day (height varies)Pacific coast
22 Importance of Tides Expose & submerge orgs Circulate water in bays & estuariesCirculates food, wastes, etcTrigger spawning (grunion, horseshoe crab)
23 Currents What are currents? Causes - “Rivers” of circulating water - Wind- Rotating Earth- Density Changes
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