| A | B |
|---|
| specific heat | amount of heat needed to raise the temperature of a substance |
| density | how heavy something is for its size |
| cohesion | the attraction among water molecules |
| water conservation | the careful use and protection of water |
| irrigation | piping in water from elsewhere and using it to grow crops |
| hydrogen and oxygen | 2 elements water is made of |
| polar molecule | water is considered this because it is attracted to other water molecules |
| precipitation | transfers water from the atomosphere back to Earth's surface |
| surface water | water at Earth's surface-includes lakes, streams, ponds |
| aquifer | layer of rock or sediment that can yield usable groundwater |
| groundwater | water held underground in rock layers |
| soil water | part of the groundwater that is held within openings in the soil |
| evaporation | liquid to a gas |
| condensation | gas to a liquid |
