🔍 Key Concepts

• High tide vs. low tide – what is actually changing? • Standard tidal terminology used on nautical charts and tide tables • The difference between a time interval and a vertical height

💭 Think About

• Ask yourself: Is the question asking about a change in water level (height) or a change in time between tides? • Look at each term and decide: Does it describe a vertical measurement, a time span, or something else? • When you read tide tables, what single term is used to describe how much higher high tide is than low tide?

✅ Before You Answer

• Identify which choice clearly refers to a vertical height difference between two tide levels. • Eliminate any option that describes time instead of height. • Consider which term you actually see printed on tide tables and tidal curves to show the vertical difference between high and low water.