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The average difference in the water level between high tide and low tide at a place is referred to as :

  • A.Tidal bore
  • B.Tidal period
  • C.Tidal range
  • D.Tidal wave

Answer: C

The average difference in water level between high tide and low tide at a place is the tidal range.

The range is the vertical difference between consecutive high and low water and is largest at spring tides. A tidal bore is a wave moving up a river or estuary on the incoming tide, the tidal period is the time between successive tides, and a tidal wave is a loose name for a very large wave such as a tsunami or a tidal bore, so options A, B and D are wrong. The range depends on the shape of the coast and the phase of the moon: it is large in funnel-shaped inlets such as the Bay of Fundy and small in open oceans.

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