Environmental Science Exam Review

This abiotic factor is necessary for the health of the food chain in the creek because most aquatic organism require this gas to live.

• pH

• Dissolved Oxygen

• Water Temperature

• Conductivity

• Fecal Coliform

Tags

NGSS.MS-LS1-5

Which abiotic factors affect the health of a stream?

• pH

• Dissolved Oxygen

• Water Temperature

• Conductivity

• Fecal Coliform

Dossolved oxygen testing requires that both samples are within _____ of each other.

• +/- 0.5

• +/- 0.6

• +/- 0.7

• +/- 0.8

True or False: The higher the dissolved oxygen the better?

• True

• False

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3

DO levels may decrease due to......(choose as many that apply)

• warm temperatures

• photosynthesis

• turbulent mixing (riffles)

• an overload of decaying organic matter

Creek critters function best within a narrow range of 6.0 to 8.5.

• pH

• Dissolved Oxygen

• Water Temperature

• Conductivity

• Fecal Coliform

This abiotic factor determines the ion concentration in the water.

• pH

• Dissolved Oxygen

• Water Temperature

• Conductivity

• Fecal Coliform

Tags

NGSS.MS-PS1-2

What is the acceptable pH range in SC streams?

• 349 CFU

• 4 ppm - 6 ppm

• 6.0 -8.5

• 20 to 100

What conditions can cause an increase in bacterial levels?

• Low water temperature and clean water

• Organic matter, runoff, and warm temperatures

• High dissolved oxygen levels

• Rocks and woody debris in the stream

What is epifaunal substrate, and why is it important to the health of a stream?

• It is the water's temperature and helps fish regulate their body heat.

• It is the stream surface where aquatic organisms live and provides food, shelter, and protection.

• It measures bacterial growth in streams.

• It is a type of chemical that removes carbon from the water.

Tags

NGSS.MS-LS2-4