Chapter 7: 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

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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

Which is NOT a freshwater wetland?

• estuary
• marsh
• swamp

Estuaries form where 

• a lake evaporates
• a river meets the sea
• a river becomes dammed
• a wetland becomes filled in

Which of the following ecosystems would not be classified as a freshwater ecosystem?

• pond
• open ocean
• river
• lake

Which is a freshwater ecosystem?

• lake
• estuary
• salt marsh
• ocean

What would most likely happen if an ecosystem no longer received sunlight?

• The number of herbivores would increase
• The number of plants would increase
• all organisms would adapt
• All living organisms would eventually die

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What aquatic biome is characterized by flowing fresh water?

• Lakes/Ponds
• Mangroves Swamps
• Rivers/Streams
• Coral Reefs

True/False - Wetlands are being drained for agricultural purposes.

• True
• False

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