| Term | Definition |
| Density | Density = Mass/Volume |
| Meter | The Metric base unit for measuring length. |
| Gram | The Metric base unit for measuring mass. |
| Condensation | Water converting from a gas to a liquid state. |
| Volume | The Metric measurement for the amount of space an object takes up. |
| Independent Variable | The variable in an experiment that the scientist controls. |
| Dependent Variable | The variable that changes with the Independent variable. |
| Controls | Experimental states that stay the same throughout the experiment. |
| Mississippi | The largest drainage basin in the U.S. |
| Youthfull River System | Fast, clear, rocky bottom rivers usually found in mountainous regions. |
| Mature River System | Medium size rivers with meanders, sediment load, and tributaries. |
| Old Age River Systems | Large, wide, slow rivers with long meanders and oxbow lakes due to heavy sediment load. |
| Meanders | The side to side movement of rivers due to erosion and sediment deposits. |
| Erosion | The transportation of soils due to the movement of water. |
| Condensation | The change of water from a gas to a liquid state. |
| 97/ 3 Percent | The percent of salt to fresh water on the Earth. |
| Infiltration | The initial movement of water into the soil surface. |
| Percolation | The deep movement of water into underground rock layers. |
| Point Source Pollution | Pollution that orginates from a single source. |
| Non-Point Source Pollution | Pollution that originates from multiple sources |
| Glacial Ice Caps | Where most of the Earth's fresh water is found. |
| Pangaea | A single land mass including all of the Earth's continents. |
| Benthic Zones | Intertidal, Sublitoral, Bathyal, Abyssal, Hadal |
| Continental Shelf | Ocean floor extending from the shore to the Continental Slope. |
| Continental Slope | Ocean floor dropping off to the Continental Rise. |
| Continental Rise | The Ocean floor extending from the slope to the Abyssal Plain. |
| Abyssal Plain | The deep Ocean floor extending from the Continental Rise. |
| Mid Oceanic Ridge | A long series of volcanic mountains crated at a Divergent Boundary. |
| Rift Valley | A long valley series located in the middle of a Mid Oceanic Ridge. |
| Trench | A deep ocean area created at a Subduction Zone. |
| Zooplankton | Animal like plankton |
| Phytoplankton | Plant like plankton |
| Benthos | Bottom dwelling ocean life |
| Nekton | Free swimming ocean life |
| Plankton | Small invisible creatures living near the ocean surface. |
| SONAR | Technique used to measure ocean depth. |
| Surface Current | Ocean water movement due to wind, the Coriolis Effect, and Continental deflection |
| Tsunami | Large wave created by earthquakes near the ocean floor. |
| Ocean Waves | Ocean water movement caused by wind. |
| Sodium Cloride | The most abundant molecule in the oceans. |
