Geography

Concepts to cover

1. Waves: crest, trough, height, wavelength, period; orbital motion of water
2. Causes of tides: gravitational pull of Moon and Sun, centrifugal force; tidal bulges
3. Spring and neap tides; perigean and apogean tides
4. Semi-diurnal, diurnal and mixed tides
5. Tidal range, tidal bores and extreme-range sites (Bay of Fundy, Gulf of Khambhat, Chandipur tidal flats)
6. Uses of tides: navigation, fishing, tidal power