| A | B |
| water cycle | the moverment of water between the atmosphere and the earth's surface |
| evaporation | changing form a liquid to a gas |
| condensation | changing from a gas to a liquid |
| precipitation | moisture that falls to the earth from the atmosphere |
| transpiration | Process of water evaporating from plants |
| infiltration | Process by which precipitation or water sinks into the soil and moves through rock cracks and spaces |
| collection | accumulation of water in lakes, rivers and streams |
| groundwater | Water that fills the cracks and spaces in underground soil and rocks |
| runoff | water that runs over the earth's surface and flows into streams |
| aquifer | An underground layer of rock that is saturated with water |
| Continental Shelf | Gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent |
| Continental Slope | A steep incline of the ocean floor leading down from the edge of a continental shelf |
| Abyssal Plain | Smooth, nearly flat region on the ocean floor |
| Trench | A deep, steep sided canyon in the ocean floor |