Marine Habitats and Landforms

What is a habitat in which the fresh water of a river meets the salt water of the ocean?

• estuary

• hydrothermal vent

• coral reef

• abyssal plain

What is a structure of calcite skeletons built up by coral animals in warm, shallow ocean water?

• coral reef

• estuary

• hydrothermal vent

• trench

What are spots on the ocean floor where hot gases and minerals escape from earth's interior into the water?

• hydrothermal vents

• estuaries

• coral reefs

• abyssal plain

What is a long, narrow, deep depression in the ocean floor, typically one running parallel to a plate boundary and marking a subduction zone?

• trench

• hydrothermal vent

• coral reef

• abyssal plain

What do we call algae that live symbiotically in coral and produce food for the coral by photosynthesis?

• zooxanthellae

• chemosynthesis

• black smokers

• tube worms

What are tiny coral animals that secrete skeletons of limestone which slowly accumulate and form coral reefs?

• coral polyps

• zooxanthellae

• phytoplankton

• zooplankton

What are heat loving microbes?

• thermophiles

• zooxanthellae

• polyps

• phytoplankton

What is a relationship in which two different organisms live in close association with each other?

• symbiosis

• chemosynthesis

• subduction

• friendship

What is a symbiotic relationship between two species in which both species benefit?

• mutualism

• parasitism

• commensalism

• competition

What is a symbiotic relationship between two organisms of different species where one benefits and the other is harmed?

• parasitism

• commensalism

• mutualism

• chemosynthesis