Chapter 4 Test Practice

Front

What is the third level of organisms in a water ecosystem that includes scavengers or decomposers?

Back

Benthos

Front

What is the shallowest part of the ocean ecosystem?

Back

Intertidal Zone

Front

What is the continuous movement of water between Earth’s surface and the air called?

Back

Water Cycle

Front

What are organisms that drift freely in the water and are not able to swim?

Back

Plankton

Front

What is the continual trapping of nitrogen gas into compounds in the soil and its return to the air called?

Back

Nitrogen Cycle

Front

What are the tiny organisms that float in water and are a crucial part of the aquatic food web?

Back

Plankton

Front

What zone of the ocean is characterized by being underwater at high tide and exposed at low tide?

Back

Intertidal Zone

Front

What is the process called where water evaporates from the surface of the Earth, forms clouds, and then falls back as precipitation?

Back

Water Cycle

Front

What term describes the organisms that live on the ocean floor, such as crabs and sea stars?

Back

Benthos

Front

What cycle involves the conversion of nitrogen gas into usable forms for plants?

Back

Nitrogen Cycle