1. Module 2-Assignment 2.2.1<br />Part 1<br />Which of the following statements best defines an estuary? <br />Estuaries are areas of salt water enclosed by land. <br />Estuaries are areas where fresh water and salt water mix, and they are usually enclosed by portions of land. <br />Estuaries are areas of fresh water that flow into salt water. <br />The amount of salt dissolved and present in water is called <br />Salinity <br />Saturation <br />Salt density <br />What factors cause the amount of salt content in an estuary to vary? <br />The flow of the rivers and tides in the area <br />The types of organisms living in the estuary <br />The temperature and shallowness of the area <br />Estuaries tend to be in shallow areas of water. <br />True <br />False <br />What are the main producers in an estuary? <br />Sea grasses and mollusks <br />Algae and fish <br />Bacteria, algae, and sea grasses <br />What are the main consumers in an estuary? <br />Arthropods and bacteria <br />Arthropods, mollusks, and fishes <br />Fishes, algae, and sea grasses <br />All organisms complete their maturity in an estuary. <br />True <br />False <br />Which larger organisms visit estuaries to eat and reproduce? <br />Eels <br />Alligators <br />Dolphins<br />What position does the pickerel fish have on the food chain in an estuary? <br />Top <br />Bottom <br />Middle <br />What positions do large aquatic insects have on the food chain in an estuary? <br />Top <br />Bottom <br />Middle<br />Part 2<br />Term Definition 1. Trash pollution a. amount of dissolved salt in the water 2. Chemical pollution b. hotness or coldness of the water 3. Temperature c. amount of light or shade in an area 4. Seasond. rise and fall of the water due to gravity 5. Tides e. clarity of the water 6. Salinity f. time of year, e.g. summer 7. Sunlight g. pollution caused by fertilizers, manufacturing, or runoff from roads 8. Turbidity h. pollution caused by materials such as plastics found in waterways <br />
