| A | B |
|---|
| water cycle | the constant recycling of water from Earth's surface to the atmosphere |
| evaporation | liquid to a gas |
| condensation | gas to liquid |
| precipitation | rain, snow, sleet, or hail |
| wave | up and down movement of water |
| storm surge | a group of very large waves |
| tides | the daily change in local water level of ocean |
| surface current | steady winds blow over surface of ocean |
| deep ocean current | density differences in oceans |
| shore zone | place where land and ocean meet |
| continental shelf | the ocean floor of shore zone |
| abyssal plain | a huge flat area of ocean floor |
| trench | deepest parts of the ocean |
| mid-ocean ridge | vast chain of mountains crossing the center of Earth's oceans |
