vocabulary

3. coastal landforms and a type of dune system that are exceptionally flat or lumpy areas of sand that form by wave and tidal action
4. organisms that live at the bottom of the Chesapeake Bay and its streams and rivers.
9. areas where water infiltrates through the permeable rock and sediment
10. an area of low-lying land which is flooded in wet seasons or at high tide, and typically remains waterlogged at all times.
12. an area of low-lying, uncultivated ground where water collects; a bog or marsh.
14. the variety of life in the world or in a particular habitat or ecosystem.
16. cloudy, opaque, or thick with suspended matter.
17. a barrier constructed to hold back water and raise its level, forming a reservoir used to generate electricity or as a water supply.

1. which refers to a reduced level of oxygen in the water.
2. the bed or channel in which a river flows.
5. a substance that provides nourishment essential for growth and the maintenance of life.
6. a grasslike plant that lives in or close to the sea, especially eelgrass
7. land consisting of marshes or swamps; saturated land.
8. slightly salty, as is the mixture of river water and seawater in estuaries.
11. the channel occupied or formerly occupied by a stream.
12. colloquial and fisheries term for exoskeleton-bearing aquatic invertebrates used as food, including various species of molluscs, crustaceans,
13. of or found in salt water; living in the sea.
15. (of a dam) hold back or confine (water).