AP Environmental Science 4.6 - Watersheds

The video explains watersheds as land areas draining into a central water body, influenced by slope, soil, and vegetation. It highlights the Chesapeake Bay Watershed's ecological importance and human impacts like nutrient pollution. Solutions such as cover crops and riparian buffers are discussed to mitigate pollution.

What determines the boundaries of a watershed?

• Slope

• Climate

• Soil type

• Vegetation

Which of the following is NOT an ecosystem service provided by the Chesapeake Bay?

• Water filtration

• Tourism

• Stormwater protection

• Desertification

What is eutrophication?

• A decrease in water salinity

• An algae bloom due to excess nutrients

• An increase in water temperature

• A process of water purification

What is a potential consequence of hypoxia in water bodies?

• Increased fish population

• Formation of dead zones

• Higher oxygen levels

• Enhanced plant growth

Which of the following is a major source of nutrient pollution in water bodies?

• Solar radiation

• Wind erosion

• Sewage treatment plants

• Deforestation

What is the effect of sediment pollution on aquatic habitats?

• Increases water clarity

• Enhances photosynthesis

• Decreases water temperature

• Covers rocky stream bottoms

Which human activity is NOT mentioned as a source of sediment pollution?

• Fishing

• Farming

• Urbanization

• Clear-cutting

How do cover crops help reduce nutrient runoff?

• By anchoring the soil and using excess nitrates

• By increasing soil erosion

• By absorbing carbon dioxide

• By blocking sunlight

What role do riparian buffers play in water pollution control?

• They increase water acidity

• They act as natural filters for runoff

• They reduce water temperature

• They increase sediment flow

Which strategy is used to manage human sewage and prevent water contamination?

• Riparian buffers

• Septic tank upgrades

• Cover crops

• Manure lagoons