Assigned on 4/7: SOL 6.7 Unit Review

What is an event in which large numbers of fish die as a result of unhealthy water quality?

• fish kill

• algal bloom

• flood

• turbidity

What body of water forms where freshwater from a river meets and mixes with salt water?

• a spring

• a lake

• an estuary

• a tributary

What does a high level of dissolved oxygen in a water quality sample most likely indicate?

• the water is safe for all organisms to drink

• there are too many particles in the water

• the sample came from a healthy water source

• the sample came from an unhealthy water source

Which human activity can increase the rate of erosion in a watershed?

• using too many fertilizers and pesticides

• constructing too many buildings and roads

• not properly disposing of chemicals

• limiting the use of fertilizers and pesticides

Which is a reason why wetlands are important to humans?

• wetlands provide us with minerals

• wetlands move water to higher ground during flooding

• wetlands filter pollutants out of water

• wetlands mix salt water with freshwater

Water from the Mississippi River watershed in Virginia ends up in

• the Pacific Ocean

• Albemarle Sound

• the Chesapeake Bay

• the Gulf of Mexico

Look at the table for this question: A student monitored the water quality of four water sources. Which water source is most likely UNHEALTHY?

• source 1

• source 2

• source 3

• source 4

Watersheds are separated from each other by

• divides

• wetlands

• streams

• lakes

Which of the following best describes the Chesapeake Bay?

• the largest wetland in the United States

• the largest estuary in the United States

• the only estuary in the United States

• the largest watershed in the United States

What are wetlands?

• bodies of water in which freshwater meets and mixes with saltwater

• parts of the ocean that are partly surrounded by land

• land areas that are covered by shallow water

• areas of land drained by river systems