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6.8 Watersheds
Unit Test Review
| Question | Answer |
|---|---|
| What is a watershed? | Land directing water flow to one area. |
| Turbidity is the cloudiness of water. What impact can it have on an aquatic ecosystem? | -Reduces sunlight needed for underwater grasses -Negatively affects plant growth |
| Why is it important to test the pH of water? | Organisms need neutral pH water. Water that is too high or low will cause the death of aquatic organisms. |
| Macroinvertebrates are a GREAT indicator of healthy water. The more the better! True or False | True |
| If there are very few macroinvertebrates, the water is likely... | polluted |
| Blue crabs, dead fish, all plants, all animals are _____________ factors of an ecosystem. | Biotic |
| Sunlight, dissolved oxygen, nitrates, soil, air are all types of non-living components of an ecosystem. They are called ___________ factors. | Abiotic |
| Prince William County is part of what large watershed system? | Chesapeake Bay |
| Divides act as boundaries that separate ____________. | watersheds |
| What are two main rivers in Prince William County that contribute to the local watersheds? | Occoquan River and the Potomac River |
| Virginia has three major watersheds. The central/northern part of Virginia directs the flow of water to which body of water? | The Chesapeake Bay |
| Virginia has three major watersheds. The central/southeastern part of Virginia directs the flow of water to which body of water? | North Carolina Sounds |
| Virginia has three major watersheds. The southwestern part of Virginia directs the flow of water to which body of water? | Gulf of Mexico |
| Wetlands are important for water quality. Name three ways wetlands improve the quality of water. | Wetlands reduce erosion. Filter pollution Provide habitants |
| The Chesapeake Bay contains a mix of ________ and _______ water. | Fresh water and salt water |
| The Chesapeake Bay is important to both humans and animals. True or False | True |
| The health of an ecosystem is ___________ related to the quality of the water. | directly |
| What is a future concern regarding water? | With population growth and the need for more food, there might not be enough fresh water to support the demand. |
| Fertilizer from farms and yards can enter into streams through runoff. This causes an increase of ___________ which is harmful to the watershed. | nitrate levels |
| High temperatures and low rainfall are _______ factors which can cause the ____________ in available biotic resources such as fish. | abiotic, decrease |
| Deforestation may cause __________ and increase _______ in a river. | erosion, sediment |
| A local conservancy organization wants to help improve the local watershed. What are two steps they could take? | -work with the local government to promote water quality education -add community disposal containers to collect waste and chemicals |
| What are a few important functions of an estuary? | -provide habitats for plants and animals acting as a nursery -it can recycle organic waste which means VERY rich, organic soil which organisms love -having brackish water allows diverse ecosystems -filter pollutants -wetlands slow flood waters |
| Water has a pH of 7. If it goes too high or too low, what happens to the organisms. | Organisms will start dying. |
Created by:
Johnsopd
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