CH.11 Flashcards
What causes the tides?
Disturbing force: sun and moon
Restoring force: gravity.
Know the definition of a diurnal, semidiurnal and mixed tide.
Diurnal: 1 high tide in 24 hrs.
Semidiurnal: 2 high tides in 24 hrs.
Mixed tides: combination
What type of tide does Miami experience?
Semi-diurnal
How are high and low tides positioned on earth with regards to the position of the moon?
High tide- earths side facing and facing away from the moon.
Low tide- regions water was taken to create high tides
What are neap and spring tides?
Neap tides: tides reduced when sun and moon at right angles.
Spring tides: tides amplified when sun and moon aligned.
Know how a full moon might or might not affect the tides?
In a full moon the tide would be higher than usual.
Tidal datum
Reference level
Tidal bores
The only real tidal wave. Advancing wall of water up a river up a river caused by tidal currents.
Amphidromic point
No tides exist
Slack water (be able to to pick it out from a tide graph)
Region of no tidal currents
When or where would you expect slack water?
During night tide
What is the only real tidal wave?
Tidal bore
Where would you find the highest tide in the world?
Canada
if the high tide is presently located near the prime meridian, what kind of tide is likely found on the international date line at the opposite side?
High tide
