Aquatic Ecosystem

This type of aquatic ecosystem is a mix of fresh and salt water.

• estuary
• lake
• river

An aquatic ecosystem includes any

• fish and frogs living there
• water environment and the community of organisms living there
• water but no animals or plants

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The major abiotic factors that influence aquatic ecosystems include

• water temperature and amount of light
• plants and animals
• water and plants growing there

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Which is a fresh water ecosystem?

• river
• estuary
• ocean

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What are areas where freshwater meets saltwater called?

• wetlands
• estuaries
• coastal byways
• intertidal zones

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Wetlands have high species diversity.

• false
• true

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Organisms in estuaries must be able to survive

• frequent dry conditions
• high winds
• changing salt levels

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One of the benefits of wetlands, is that they can

• replace lakes and ponds
• filter pollutants out of water
• provides land for housing developments

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Deep ocean technology has discovered organisms in hydrothermal vents that do not rely on sunlight to survive. What do these organisms use as their energy source?

• chemosynthesis
• electrical charge
• hydropower
• thermal heat

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Which is NOT a freshwater ecosystem?

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

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