Sunday, September 9, 2007

Tides

What is a tidal range? A tidal range is the difference of water levels, between successive high and low tides.

What causes high and low tides? High and low tides are caused by a combination of the gravity of the sun and the moon. It also uses the centrifugal force that results from the rotation of the earth, moon, and the sun.

What causes spring and neap tides? When the sun and the moon are aligned with each other or the tide range is large it causes a spring tide. Neaptides are caused when the sun and moon are at its right angles, where as their effects partially cancel each other, or when the tidal range is small.

How does tidal range effect the types of organisms and the shape and size of the organisms? The tides alternately expose and submerge organisms, where as on the shore drive, the circulation of the bays and estaries, trigger spawning, and influence the lives of marine organisms in many different ways.