Marine and Freshwater Ecosystems Quiz

What is the primary factor that shapes marine systems?

• Water temperature, water depth, and sunlight

• Ocean currents

• Types of fish

• Amount of pollution

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

• Benthic Zone

• Thermocline

• Surface zone

• Deep Zone

What type of organisms are plankton?

• Producers

• Consumers

• Parasites

• Decomposers

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

• Neritic Zone

• Intertidal Zone

• Benthic Zone

• Oceanic Zone

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

• The Sargasso Sea

• Polar Ice

• Coral Reefs

• Estuaries

Which zone is characterized by deep water and open ocean?

• Littoral Zone

• Intertidal Zone

• Oceanic Zone

• Neritic Zone

What is the primary characteristic of the water in the Polar Ice regions?

• Polluted

• Rich in nutrients

• Warm and shallow

• Stagnant

Which organisms primarily make up coral reefs?

• Fish

• Plankton

• Coral

• Sea urchins

What is the primary source of energy for the majority of marine ecosystems?

• Geothermal vents

• Sunlight

• Tidal movements

• Chemical nutrients

Which marine zone is characterized by high levels of sunlight and abundant plant life?

• Deep Zone

• Surface Zone

• Benthic Zone

• Thermocline