Water Biomes

What are the three main types of water ecosystems?

• saltwater, oceans, ponds

• intertidal, freshwater, estuaries

• saltwater, freshwater, estuaries

• near-shore, rivers, estuaries

 ________ ecosystems are where salt water and fresh water mix.

• ocean water

• brackish water

• fresh water

_________ that empty into the ocean provide most of the nutrients for this zone.

• plants

• animals

• rivers

• ponds

What is the order of the ocean zones from shallowest to deepest?

• intertidal, near-shore, open-ocean

• near-shore, intertidal, open-ocean

• open-ocean, near-shore, intertidal

• intertidal, open-ocean, near-shore

The ______ zone is very deep, but most organisms live near the surface.

• intertidal

• near-shore

• open-ocean

At the mouth of a river, the water contains huge amounts of _______ and organic matter.

• salt

• swamps

• grasses

• nutrients

_________ water is a mixture of fresh water and salt water.

• polluted

• river

• brackish

• pond

A place where a fresh water river empties into an ocean.

• swamp

• estuary

• marsh

• stream

What determines the kinds of organisms that live in the freshwater ecosystem?

• water temperature and speed

• pollution and size

• animals and plants

• people and sunlight

Sunlight can reach a depth of ______ feet.

• 10

• 600

• 650

• 5,000