🔍 Key Concepts

• Tidal patterns (diurnal, semidiurnal, mixed) • Meaning of a lunar day versus a 24-hour solar day • How many high and low waters happen in each tidal type

💭 Think About

• First, recall the definition of a diurnal tide and how many high and low waters it has in one lunar day. • Compare each choice to that definition: which option correctly matches the number of highs and lows and the time reference used? • Think about which option might actually be describing semidiurnal or spring/neap tides instead of diurnal.

✅ Before You Answer

• Verify how long a lunar day is (hint: it’s not exactly 24 hours). • Confirm how many high tides and low tides occur in a diurnal tide pattern. • Check which option is talking about tide height being unusually high or low rather than the number and timing of tides.