Aquatic Ecosystems

Temperature, sunlight and oxygen are examples of ____ factors.

• abiotic
• biotic

Tags

NGSS.MS-LS2-3

When soil washes into a river from a stream or from land, what is added to the water?

• dirt
• oxygen
• rocks
• nutrients

Which natural disaster is made worse when people destroy estuaries?

• flooding and storm damage
• tornados
• earthquake
• drought

What are areas where freshwater meets saltwater called?

• wetlands
• estuaries
• coastal byways
• intertidal zones

Tags

NGSS.MS-LS2-3

Which is NOT a freshwater ecosystem?

• stream
• lake
• ocean
• river

What special adaptations do species living in estuaries have?

• to resist UV rays

• to survive exposure to air

• to survive heavy waves

• adapted to varying amounts of salinity

How do people use water from freshwater ecosystems?

• drinking
• bathing
• crop irrigation
• all of the above

What is salinity?

• the amount of salt dissolved in water
• the amount of oxygen dissolved in water
• the amount of pollution in water
• the speed of the flow of water in a stream

Runoff fertilizer and livestock waste from farms can result in ____ in a river, pond or lake.

• excess nutrients (nitrogen and phosphorus)

• excess oxygen

• excess carbon dioxide

• lower amounts of nutrients (nitrogen and phosphorus)

Wetlands and estuaries purify water and filter out _____.

• dead organisms
• waste products
• salt
• pollution

Tags

NGSS.MS-LS2-3