| A | B |
|---|
| Wave | A rhythmic movement in water that carries energy. |
| Tide | The water level at the ocean's edges. The rise and fall of sea level caused by the gravitational pull of the Sun, Moon, and Earth. |
| Sediments | Loose pieces of rock, plant, or animal material that is moved by wind, ice, water, or gravity. |
| Wavelength | The horizontal distance between two crsts or troughs of two successive waves. |
| Wave height | The vertical distance between the top and bottom of a wave. |
| Trough | The lowest point of a wave. |
| Crest | The highest point of a wave. |
| Breaker | A wave approaching the shore. The bottom of the wave cannot support the top and the wave falls on itself. |
| Spring Tide | A tide created when the Sun, Moon, and Earth are in a straight line. |
| Neap Tide | A tide created when the Sun, Moon, and Earth form a right angle. |
| Atmosphere | Earth's air which is made up of a thin layer of gases, liquids, and solids. |
| Salinity | A measure of dissolved salts in seawater. |
| Photosynthesis | The process by which organisms use sunlight, water, and carbon dioxide to make food and oxygen. |
| Thermocline | A layer of the ocean water that begins at a depth of 200 meters and becomes colder and deeper. |
| Current | Water moving continuously in a certain direction. |
| Surface Current | A movement of water on the surface powered by wind. |
| Density Current | A water current below the surface that happens when more dense water sinks below less dense water. |
| Upwelling | An ocean current that brings deep cold water to the surface. |
| Microorganisms | A man or one celled organism too small to be seen without magnification. |
| Groundwater | Water that soaks into the ground and collects in small spaces between bits of soil and rock. |
| Point Source Pollution | Pollution that comes from a single, identifiable source. |
| Nonpoint Source Pollution | Pollution that cannot be traced back to an exact location. |
