Aquatic Ecosystems, Nitrogen Cycle and Phosphorus Cycle Quiz

Water ____________ sunlight; thus photosynthesis in lakes and oceans does not occur below 100 meters.

• absorbs

• blocks

• reflects

• transmits

Tags

NGSS.MS-PS4-2

Which aquatic ecosystem is adversely affected by runoff?

• rivers

• Oceans

• Estuaries

• All of these

Tags

NGSS.MS-LS2-1

What distinguishes nekton from benthos?

• Nekton are free-swimming, benthos are bottom-dwellers

• Nekton are photosynthetic, benthos are not

• Nekton are microscopic, benthos are large

• Nekton are stationary, benthos move

Which gas makes up 78 percent of our atmosphere but can be used by plants only when transformed by bacteria first?

• Hydrogen

• Nitrogen

• Carbon dioxide

• Oxygen

Excessive use of ____________________ on lawns and gardens can affect the nitrogen and phosphorus cycles in nearby lakes and streams.

• fertilizers

• soil

• dirt

• sunlight

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which biogeochemical cycle is the only one without an atmospheric component?

• Nitrogen cycle

• Water cycle

• Carbon cycle

• Phosphorus cycle

Tags

NGSS.MS-ESS2-1

In an estuary, when fresh water meets salt water, currents form and cause

• limestone to fall to the bottom

• nutrients to fall to the bottom

• harbors to be created

• freshwater ponds to become salty

Tags

NGSS.MS-ESS2-4

Which of the following is not correct?

• Lakes may contain a region that recieves little sunlight

• Wetlands help remove pollutants from water

• Swamps are dominated by woody shrubs or water-loving trees

• Rivers generally move faster, and their oxygen level decreases as they approach the ocean

Which of these are threats to ocean ecosystems?

• nutrient runoff and industrial waste discharge

• entanglement of marine mammals in trawl nets and over fishing

• sewage and algal blooms

• all of these are threats to ocean ecosystems

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

Estuaries are extremely productive ecosystems because they continually recieve fresh nutrients from __________ and __________.

• rivers, oceans

• lakes, ponds

• marshes, swamps

• streams, springs

Tags

NGSS.MS-LS2-1