| A | B |
|---|
| nitrates | naturally occurring compounds that contain nitrogen and oxygen |
| dissolved oxygen | oxygen dissolved in water |
| pH | measure of hydrogen ion concentration in aqueous solution |
| biological indicators | plants and animals that are used to determine water quality |
| nitrates | natural compounds that contain nitrogen and oxygen |
| turbidity | measure of light scattering by suspended materials; cloudiness or haziness |
| indicator | chemical material or solution used to show evidence of a chemical change |
| pH scale | rating of how basic or acidic a substance is |
| pH scale | ranges from 0-14 |
| acid | pH<7 |
| base | pH>7 |
| water quality | describes the health of a water system |
| temperature | measure of average kinetic energy of molecules |
| litmus | indicator that is red in acids and blue in bases |
| neutral | pH=0 |
| pure water | neutral |
| macro-invertebrate | small, spineless organism that's visible with the undaided eye: examples: workms, insects, mollusks, crustraceans |
| NTU | unit for measuring turbidity |
