| A | B |
|---|
| coral | a stony substance consisting of skeletons of certain kinds of very small sea animals called polyps |
| guano | Manure of sea birds; a fertilizer made from fish |
| lagoon | a pool of shallow water connected to the sea by an inlet |
| limestone | rock consisting mostly of calcium carbonate |
| volcano | a cone-shaped mountain formed by lava and cinders that erupted through a crater |
| beach | the pebbly sandy shore of the sea or of a lake that is washed by waves |
| channel | a narrow strip of water |
| continent | any one of the seven largest areas of land on the Earth’s surface |
| gulf | an area of water bordering on, and lying within, a curved coastline; usually larger than a bay and smaller than a sea |
| bay | any inlet of the ocean or part of the ocean bordering on land and partly surrounded by land |
| waves | a moving ridge of water which rises and falls |
| sea | a large body of water partly surrounded by land |
| current | the swiftly moving part of a stream; or the continuous movement in one direction of the surface water in an ocean |
| breakers | waves breaking into foam as they approach or dash against the shore |
| horizon | the line where the Earth’s surface and the sky seem to meet |
| peninsula | a piece of land nearly surrounded by water and attached to a larger area of land or the mainland by an isthmus |
| harbor | a sheltered body of water where ships anchor and are protected from storms |
| sea level | the average level of the surface of the ocean measured along a shoreline |
| breakwater | a wall built in water near the shore to break the force of the waves and to provide shelter for boats and ships |
| elevation | height or distance above sea level |
