Aquatic Ecosystems Review

Which of the following statements is not correct?

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

• Wetlands help remove pollutants from water.

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

• Lakes may contain a region that receives little sunlight.

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.

The majority of marine organisms are found in

• deep ocean waters.

• shallow, tropical waters.

• fisheries.

• None of the choices

Threats to ocean ecosystems include

• nutrient runoff and industrial waste discharges.

• overfishing and entanglement of marine mammals in trawl nets.

• sewage and algal blooms.

• All choices are threats

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Which organism produces most of the food in an aquatic ecosystem?

• fish

• phytoplankton

• coral

• barnacles

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is not an environmental function of wetlands?

• increasing runoff

• controlling floods

• absorbing and removing pollutants from water

• trapping greenhouse gasses (CO2)

Tags

NGSS.MS-LS2-5

The types of organisms found in aquatic ecosystems depend on

• the amount of sunlight available.

• the temperature of the water.

• the presence of nutrients.

• All of these factors affect aquatic organisms

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The least productive aquatic ecosystem is ________________.

• the open ocean

• coral reefs

• an estuary

• a mangrove swamp

The most productive aquatic ecosystem is ________________.

• the open ocean

• coral reefs

• an estuary

• a mangrove swamp

Tags

NGSS.MS-LS2-3

Swamps are commonly found on

• rocky hillsides.

• flat, poorly drained, wooded land.

• forest clearings.

• bottoms of ponds or lakes.