Tidal Patterns and Characteristics

The video tutorial explains the regular rise and fall of tides, their causes, and variations in height and timing across different locations. It covers tidal data from San Francisco, discusses tidal patterns like semi-diurnal and mixed tides, and explains tidal range and currents. The tutorial also compares tidal patterns across various U.S. locations and describes neap and spring tides, highlighting their impact on activities like fishing and boating.

What is the most regular feature of coastlines worldwide?

• The daily rise and fall of tides

• The presence of coral reefs

• The constant erosion of beaches

• The formation of sand dunes

What is the zero level used in tidal data known as?

• Equilibrium level

• Tidal datum

• Average wave height

• Mean sea level

How often do two complete tidal waves occur?

• Every 48 hours

• Every 24 hours and 50 minutes

• Every 24 hours

• Every 12 hours

What is a semi-diurnal mixed tidal pattern?

• Two high tides and two low tides with varying heights

• Two high tides and two low tides with equal heights

• No tides at all

• One high tide and one low tide every 24 hours

Which location in the United States has a semi-diurnal tidal pattern?

• Miami, Florida

• San Francisco, California

• Eastport, Maine

• Anchorage, Alaska

What are neap tides characterized by?

• No change in water levels

• Constant water levels

• The lowest highs and the highest lows

• The highest highs and the lowest lows

During which tides would you expect the lowest water levels?

• Spring tides

• Neap tides

• Mixed tides

• Diurnal tides

Which location experiences the largest tidal range during spring tides?

• San Francisco

• Florida

• Eastport, Maine

• Anchorage, Alaska

What is the safest time to move boats through shallow waterways?

• During high tide

• During spring tides

• During neap tides

• During low tide

When planning a beach picnic, which tides would minimize water level changes?

• Diurnal tides

• Neap tides

• Mixed tides

• Spring tides