| wetlands | land saturated with water |
| foothills | hilly area at the base of a mountain |
| gap | passage through mountains |
| inlet | narrow passage of water |
| marsh | lowland with moist soil |
| peak | pointed summit of a mountain |
| tributary | river that empties into a larger river |
| product | answer to a multiplication problem |
| quotient | answer to a division problem |
| square root | number times itself |
| exponent | how many times a number is used as a factor |
| variable | A letter that represents a number |
| consecutive | one after another |
| formula | mathematical equation |
| estimate | educated guess |