Ocean Zones and Ecosystems

What are the main factors that determine the types of organisms in aquatic ecosystems?

• Chemistry, geography, light, depth, salinity, and temperature

• Only temperature and light

• Only salinity and depth

• Only geography and chemistry

Tags

NGSS.MS-LS2-2

Which of the following is NOT a main aquatic ecosystem?

• Deserts

• Lakes

• Rivers

• Wetlands

What organisms live on the floor of a body of water?

• Benthos

• Plankton

• Phytoplankton

• Zooplankton

What are the two key factors that determine which organisms can live in an aquatic ecosystem?

• Dissolved oxygen level and water temperature

• Salinity and light

• Depth and geography

• Chemistry and flow

Tags

NGSS.MS-LS1-5

What are phytoplankton?

• Single-celled algae that use nutrients in the water to make food

• Animals that feed on phytoplankton

• Organisms that live on the floor of a body of water

• Tiny free-floating swimming organisms

Tags

NGSS.MS-LS2-3

What do zooplankton feed on?

• Phytoplankton

• Benthos

• Plankton

• Algae

What is salinity a measure of?

• The amount of salt in water

• The temperature of water

• The depth of water

• The flow of water

What type of ecosystem includes rivers and streams?

• Flowing water ecosystems

• Standing water ecosystems

• Wetlands

• Estuaries

What are estuaries?

• Wetlands formed where rivers meet the sea

• Lakes and ponds

• Rivers and streams

• Bogs, marshes, and swamps

Tags

NGSS.MS-LS2-4

Which zone of the ocean is the shallowest and closest to land?

• Neritic zone

• Intertidal zone

• Aphotic zone

• Photic zone