The sea constantly changes coastlines through erosion, transportation, and deposition of material. Waves erode the coastline through processes like hydraulic action and abrasion, forming landforms such as cliffs, bays, and sea caves. Material is transported along the shore by swash and backwash and through longshore drift. Deposition by the sea creates beaches, sand dunes, sand spits, and lagoons. People build structures like sea walls, place boulders, and construct groynes to protect coastlines from erosion while also utilizing coastlines for tourism, industry, and recreation.

1. The Sea Creator and Destroyer

3. Why do waves break on the Shoreline?

8. Constructive Waves

10. Destructive Waves

18. Bays and Headlands

19. Caves, Arches, Stacks & Blowholes

24. Caves, Arches, Stacks & Blowholes

32. Beaches

35. Spits, Bars, Tombolo, Lagoon

39. Spits, Bars, Tombolo, Lagoon

43. Protecting the Coastline using Groynes

44. Protecting the Coastline using Boulders

45. Tourism and our Coastline