| A | B |
|---|
| Density is a measure of | How much stuff is packed into a given volume |
| The NC standard for this paramater in fresh water is at least 6 ppm. | dissolved oxygen |
| Where is most of the Earth's fresh water found? | In glaciers and ice caps |
| What percent of the Earth's water is available for us to use to drink, water livestock, and grow crops? | less than 1% |
| This measures how much light gets through the water | turbidity |
| The process of rocks and/or soil breaking down is called_____________ | weathering |
| The process of moving sediments by wind, water, or gravity | erosion |
| In managing storm water runoff, water quality is generally improved by | slowing the movement of water through the cycle |
| pH of pure water | 7 |
| pH of slightly acidic water | a little less than 7 |
| pH base of alkaline water | higher than 7 |
| acid rain can have a pH as low as | 4 |
| Part of solution there is the most of | Solvent |
| Parts of solution there is less of than the solvent | solutes |
| salt in salt water is what part of the solution | Solute |
| To be a solution the particles of solute must be | Mixed evenly |
| What sort of solvent is water | An excellent solvent |
| Why is water a good solvent | Being polar makes water good at dissolving things |
| Water is very cohesive, what does this mean | It sticks well to other things |
| Water is very adhesive, what does this mean | Water sticks to itself |
| Water does what with heat, why? | Traps and stores heat because it is polar |
| What chemicals act as fertilizers in water | Nitrates and Phosphates |
| 97% of Earth's water | is in oceans |
| Where does NC get most of its drinking water | From aquafers |
| Desert town with little water--least expensive way to have more? | Conservation education |
| How has the amount of water in hydrosphere changed over time | Same amount of water overall |
| Land where water flows into a river system | Watershed |
| Where water in a water shed usually flows | River system |
| Where ocean water and fresh water mix | Estuary |
| What is the primary function of water treatment plants | Lower risk of water born disease |
| Nonpoint agricultural pollution does the most damage where | downstream from farms |
