Campbell San Jorge Unit 5 Biomes and Aquatic Ecosystems

Which is NOT a freshwater ecosystem?

• a river
• a lake 
• an estuary
• a stream

A wetland that contains a mixture of fresh water and salt water is called

• an estuary
• a stream
• a river
• a pond

The photic zone

• extends to the bottom of the open ocean
• receives the most sunlight
• is deep, cold, and permanently dark
• is where chemosynthetic bacteria are the producers

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The aphotic zone is

• the ocean's dark lower layer where photosynthesis cannot occur
• the sunlit upper layer of the ocean where photosynthesis occurs
• on the bottom of lakes, streams, and oceans.
• where benthos are found

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The intertidal zone of oceans

• surrounds continents
• is on the coastline
• has tides that rise and fall each day
• is the open ocean

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Which factor(s) affect aquatic ecosystems?

• depth
• flow
• nutrients
• all affect aquatic ecosystems

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Circulating water in lakes and ponds is important for distributing 

• heat
• oxygen
• nutrients
• all of these

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phytoplankton are

• tiny autotrophic organisms in water
• large plants 
• tiny heterotrophic organisms in water
• large animals

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zooplankton are

• tiny autotrophic organisms in water
• large plants
• tiny heterotrophic organisms in water
• large animals

An ecosystem where water covers the soil or water is near the surface of the soil is called

• a desert
• an ocean
• an estuary
• a wetland