| A | B |
|---|
| Humidity | The measure of water vapor in the air |
| Atom | The smallest partical of matter |
| Molecule | A combination of atoms bound together |
| Solvent | A liquid that dissolves another substance |
| Hydrologic | Referring to water |
| Evaporation | The process which liquid turns into water vapor |
| Water Vapor | Water as gas in the air |
| Condensation | The process which water vapor changes into liquid |
| Surface Runoff | Water traveling over the surfac of the ground |
| Precipitation | Rain, Sleet, Hail, or snow |
| Ground Water | A small water source underground as in a spring or well. |
| Aquifer | A large underground water supply |
| Percolation | Water moving downwards through openings in the soil |
| Density | How closely the molecules in a substance are placed together. |
| Hypothesis | An educated guess. What a scientist thinks will happen |
