Tides Flashcards
What is the average tidal range?
2 metres
What may the tide reach in bays, straits and estuaries?
Over 10 metres
What is sorting of coastal material?
Heavy pebbles and sand deposited closer to coast
Lighter silts and mud transported further out to sea
What is high tide?
The maximum extent the swash will reach on a beach
What causes high tide?
Moons gravitational force pulls Earth’s oceans towards it
What is diurnal tides?
Point at which a wave breaks on a beach. Adding energy to coastal system
Where does the active area of coastal erosion lie?
Within the area between high and low tide
What is a neap tide?
Tide just after first or third quarters of the moon, when there is least difference between high and low tide (6 a.m. and 6 p.m.)
What is a spring tide?
Tide just after a new or full moon, when there is the greatest difference between high and low tide
How long between diurnal tides?
12 hours
Which location has the highest tidal range in the world?
Bay of Fundy, Canada
Which river has the highest tidal range in the UK?
Severn Estuary
How does the shape of the coastline influence tidal range?
Narrowing coastline causes ‘bottleneck’ effect. Depositing heavier sediments closer to coast and light sediment further out to sea
