Marine and Freshwater Ecosystems Quiz

What is the primary factor that shapes marine systems?

• Salinity levels

• Water temperature, water depth, and sunlight

• Proximity to land

• Ocean currents

Which zone in the ocean is characterized by warm water and extends about 300 meters below sea level?

• Benthic Zone

• Surface zone

• Deep Zone

• Thermocline

What type of organisms are plankton?

• Producers

• Decomposers

• Consumers

• Scavengers

Which zone is known for having no sunlight and very cold conditions?

• Oceanic Zone

• Benthic Zone

• Intertidal Zone

• Neritic Zone

What type of ecosystem is found where freshwater from rivers mixes with saltwater from the ocean?

• Estuaries

• Coral Reefs

• Sargasso Sea

• Polar Ice

Which animals are typically found in the Polar Ice regions?

• Dolphins and turtles

• Sea stars and sea anemones

• Polar bears and penguins

• Sharks and large fish

What is the primary characteristic of the water in the thermocline zone?

• Highly saline

• Temperature drops

• Cold and deep

• Warm and shallow

Which zone of a pond or lake is only as deep as light can reach?

• Littoral Zone

• Deep Water Zone

• Open Water Zone

• Marsh

What is unique about the Sargasso Sea?

• It is a freshwater lake

• It is the deepest part of the ocean

• It has floating rafts of algae called sargassum

• It is completely frozen over