| A | B |
|---|
| sea | region of ocean water partly enclosed by land |
| world ocean | bodies of salt water around earth |
| dissolve | to break down in a liquid |
| salinity | amount of dissolved salt in water |
| density | amount of matter in a given volume |
| hydrometer | instrument to measure density |
| continental shelf | edge of coastline and slopes below sea level |
| continental slope | ocean floor drops more steeply |
| abyssal plain | bottom of the ocean floor |
| mid-ocean ridge | largest mountain chain on Earth |
| seamounts | single peaks rising from the ocean floor |
| trenches | deepest valleys in the ocean floors |
| island | land above sea level |
| sonar | acoustic waves to detect underwater objects |
| depth profile | display of depth measurements |
| evaporation | liquid to gas |
| condensation | gas to liquid |
| precipitation | any form of water from clouds |
| water cycle | circulation of water in the environment |
| crest | highest point of a wave |
| trough | lowest point of a wave |
| wave height | vertical distance from trough to crest |
| wavelength | horizontal distance between 2 successive crests |
| breaker | when a wave topples over itself |
| currents | water flow across ocean |
| surface currents | located in upper 100-200 m of ocean |
| prevailing winds | winds that blow all the time |
| Coriolis effect | a force of the earth’s rotation on its axis from west to east |
| density current | flow of denser water to regions of less dense water |
| tides | alternating rise and fall of surface level of the ocean |
| gravitational pull | the natural force of attraction exerted by Earth |
| high tide | swell in water |
| low tide | water draining between swells |
| adaptations | feature that enables an organism to survive in an environment |
| swim bladder | - balloon-like sac that helps fish control floating |
| buoyancy | ability to float |
| warm-blooded | internal body temperature remain constant |
| cold-blooded | body temperature changes to the surrounding temperature |
| intertidal zone | harsh ever-changing environment |
| mollusk | soft bodied animal with a shell |
| exoskeleton | external skeleton (shell) |
| bivalves | mollusk with 2 shells |
| univalves | mollusk with 1 shell |
| neritic zone | shallow ocean area that extends from low tide |
| vertebrates | animal with a backbone |
| invertebrates | animals without a backbone |
