Aquatic Biomes Review 22-23

The types of organisms found in a pond or lake depend on

• the amount of sunlight available.

• the temperature of the water.

• the presence of nutrients.

• All of the above.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What mainly distinguishes nekton from benthos?

• One lives in a freshwater ecosystem and the other lives in salty water.

• One swims freely and the other often lives attached to a hard surface.

• One is a predator and the other is a primary producer.

• All of the above.

Estuaries are very productive ecosystems because they receive fresh nutrients from

• lakes and ponds.

• rivers and oceans.

• marshes and swamps.

• streams and springs.

Which of the following statements in NOT correct?

• Lakes may contain a region that receives little sunlight.

• Wetlands help remove pollutants from the water.

• Swamps are dominated by woody shrubs and water-loving trees.

• Rivers generally move faster, and their oxygen levels decrease. as they near the ocean.

Tags

NGSS.MS-ESS2-4

In the ____ zone, life is diverse and abundant.

• benthic

• eutrophic

• littoral

• plankton

Estuaries

• are always saltwater ecosystems.

• are always freshwater ecosystems.

• are ecosystems where both fresh water and salt water are present.

• prevent the development of salt marshes.

Tags

NGSS.MS-LS2-3

What causes most coastal pollution in the United States?

• overfishing

• temperature changes

• industrial waste and sewage

• lakes and ponds

Tags

NGSS.MS-ESS3-3

Most pollutants that enter estuaries break down over time, yet they are still considered a problem because

• the pollutants eventually concentrate in the ocean.

• it is the volume of the pollutants, more that the time factor, that harms estuaries.

• the pollutants break down into still more dangerous toxins.

• None of the above

As they flow down a mountain to flatter ground, rivers generally become

• wider.

• warmer.

• slower.

• All of the above.

Tags

NGSS.MS-ESS2-4

Two threats to ocean ecosystems are

• nutrient runoff and industrial waste discharges.

• overfishing and entanglement of marine mammals in trawl nets.

• sewage and algal blooms.

• All of the above.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-5