The largest number of shells would be exposed along a beach during which tide?

The largest number of shells would be exposed along a beach during which tide?

• A. Spring tide
• B. Neap tide
• C. High tide
• D. Low tide

Answer: (A)

Tidal exposure hinges on how far the water recedes at low tide. When the Sun, Moon, and Earth line up, the gravitational forces combine to produce the strongest tides—both higher highs and lower lows. That means the low tide during a spring tide is much deeper than usual, exposing a lot more of the beach and any shells scattered there. Neap tides have weaker tides, so the water doesn’t pull back as far. High tide isn’t about exposing shells at all, since the water is further up the shore then. So the greatest shell exposure occurs during a spring tide.

Tidal exposure hinges on how far the water recedes at low tide. When the Sun, Moon, and Earth line up, the gravitational forces combine to produce the strongest tides—both higher highs and lower lows. That means the low tide during a spring tide is much deeper than usual, exposing a lot more of the beach and any shells scattered there. Neap tides have weaker tides, so the water doesn’t pull back as far. High tide isn’t about exposing shells at all, since the water is further up the shore then. So the greatest shell exposure occurs during a spring tide.