| A | B |
|---|
| infiltration | process by which water soaks into the ground |
| evaporation | the sun's energy turns water from the earth's surface into water vapor |
| sun | its energy drives the water cycle |
| runoff | when water flows over the surface of the earth |
| groundwater | water that soaks into the ground |
| salt water | 97% of the earth's water is this |
| 105 gallons | amount of water used per person per day in the U.S. |
| hydrosphere | includes all the water on the earth's surface |
| hydrologic cycle | another name for the water cycle |
| clouds | formed by condensation |
| precipitation | hail, sleet, rain and snow |
| water vapor | another name for steam |
| plant roots | act like sponges to soak up and hold water |
| slope | affects the amount of runoff |
| transpiration | plants contribute water to the water cycle by this process |
| glaciers and polar ice caps | where frozen water is located |
| potable | water that is drinkable |
| toilet | where most water consumption takes place in the home |
| 70% | percentage of earth covered in water |
| 97% | percentage of earth's water that is salty |
