Freshwater Ecosystems Quiz

What is the salinity level of freshwater ecosystems?

• 2 ppt

• 1 ppt

• 3 ppt

• 0.5 ppt

What are the two main types of freshwater ecosystems?

• Swamps and bogs

• Wetlands and marshes

• Rivers and streams

• Ponds and lakes

What is the difference between ponds and lakes?

• Nutrient content

• Depth

• All of the above

• Size

What is the littoral zone in lakes and ponds?

• The area with high nutrient content

• The area with shallow water near the shore

• The area with no rooted plants

• The area with acidic water

What is the ecological importance of wetlands?

• Preventing flooding

• Recharging aquifers

• All of the above

• Filtering pollutants

What type of wetland is characterized by low nutrients and acidic water?

• Fens

• Swamps

• Marshes

• Bogs

What is the area of land drained by a river and all of its tributaries called?

• Wetland

• Photic zone

• Watershed

• Flood plain

What is the source of most rivers?

• Low in the valleys

• In the desert

• High in the mountains

• Near the ocean

What is the term for the wide, curvy paths created by slow-flowing water in a river?

• Meanders

• Oxbow lakes

• Tributaries

• Flood plains

What type of fish must have strong, sleek bodies to swim against the current in a river?

• Bass

• Salmon

• Catfish

• Trout