| A | B |
|---|
| eutrophication | over abundance of nutrients in the water |
| phosphorous | nutrient needed for life and found in fertilizer |
| nitrogen | atmospheric gas converted by nitrogen-fixing bacteria into a usable form to make protein |
| wic system | form of hydroponics using an absorbent cotton wic to bring nutrients to plant |
| pH | measurement of the amount of H+ ions or OH- ions in solution |
| acid | H+ ions |
| base | OH- ions |
| pH scale | ranges from 0 to 14; 0-6.9 = acid; 7 = neutral; 7.1 to 14 = base |
| ppm | parts per million |
| ppm meter | measures the amount of nutrients present in solution per one million parts solution |
| hydroponic medium | non-nutritious material used to support seeds in a wic system |
| perlite | absorbent material used in hydroponic medium |
| coconut husks | supportive substance, without nutrients, that make up hydroponic medium |
| water pollution | presence of undesired substances in water |
| water pollution point source | pollution comes from one or only a few sources and can be easily identified |
| water pollution non-point source | pollution comes from many sources and cannot be easily identified |
| run off | the drainage of precipitation across the earth's surface that can bring pollutants into water reservoirs |
| infiltration | the seepage of precipitation into the soil that can bring pollutants into the soil and ground water |
| algae | small, blue-green plant that grows in water |
| cultural eutrophication | the over abundance of nutrients in the water caused by human activities |
