5 Written questions
5 Matching questions
- a Which direction do gyres flow in the Northern hemisphere?
- b These waves are the first to form when the wind blows.
- c In these boundary currents, the flow is from East to West or West to East. They link eastern and western boundary currents.
- d These boundary currents move warm water from the equator towards the poles.
- e Circular flow pattern of water caused by deflection of water by continents and the ocean basin.
5 Multiple choice questions
- Progessing groups of swell with the same origin and wave length are known as this.
- A breaking wave whose crest slides down the face of the wave.
- A high, often breaking wave generated by a tide crest that advances rapidly up an estuary or river.
- Surface currents are powered by the sun and ______________
- Horizontal distance between two consecutive wave crests or wave troughs
5 True/False questions
Geostrophic Gyres → caused by the gravitational and inertial interaction of the sun and earth
Undercurrents → Currents flowing on surface in opposite direction to main currents.
Long → Waves with ___________ wavelengths move the fastest.
Western → Eddies do not tend to form in these boundary currents.
Ebb Current → Water rushing out of an enclosed harbor or bay because of the fall in sea level as a tide trough approaches.