| Term | Definition |
|---|---|
| upstream | where the water comes from <uphill> |
| downstream | where the water goes to |
| river source | farthest point upstream |
| river mouth | farthest point downstream , were is the water enters to another body of water |
| tributary | contributes water to a larger body of water |
| floodplain | flat area likely to flood |
| fertilizer | fishes die from the eutrophication |
| litter/trash | chock wildlife (bird,turtle) |
| pesticides | poisons animals high on the food chain biomagnification |
| fresh water | has no salt in (all river and water on the land,(mostly) ) |
| salt water | in the sea or in ocean and mostly some of lakes |
| brakish water | in estuaries <like galveston bay) |
