8.E.1.3/8.E.1.4

Pure water is neutral. If water is neither an acid nor a base, what is the pH of water?

• 0

• 7

• 10

Which best describes the relationship between temperature and dissolved oxygen in a lake?

• As temperature increases, dissolved oxygen increases.

• As temperature increases, dissolved oxygen decreases.

• As temperature decreases, dissolved oxygen decreases.

• A change in temperature has no effect on dissolved oxygen.

What does pH measure?

• acidity/alkalinity

• dissolved oxygen

• nutrient level

• turbidity

Which would be the most likely cause of large numbers of fish dying in a stream?

• a lack of nitrogen

• high levels of mercury

• decreased carbon dioxide

• low dissolved oxygen concentration

Tags

NGSS.MS-LS2-4

Which factors can have the greatest effect on the health of a river system?

• type of soil and salinity

• nitrate levels and turbidity

• human consumption and pH

• natural disasters and tidal change

Tags

NGSS.MS-LS2-4

NGSS.MS-ESS3-4

Which best determines the health of a lake used as a source of freshwater?

• its depth and width

• its temperature and pH

• its location and depth

• its temperature and depth

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-3

If a body of water has high turbidity levels, what can most likely be concluded?

• It has a low pH

• It is unsafe to drink

• It is too hot to drink

• It contains lots of chemicals

Tags

NGSS.MS-LS2-1

Which will occur if humans continue to overload water systems with excess nutrients?

• chemosynthesis

• eutrophication

• nitrification

• photosynthesis

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-ESS3-4

Which does an increase in eutrophication indicate to scientists studying a body of water?

• an increase in fertilizer runoff

• a decrease in pollutants from farm runoff

• an increase in the health of the body of water

• an increase in oxygen levels in the body of water

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which aspect of fertilizer pollution would have the greatest negative impact on an aquatic ecosystem?

• Nitrates poison the water that fish breathe through their gills.

• Microorganisms in the water absorb all the oxygen, suffocating animals.

• Aquatic animals increase, adding producers to the food chain and feeding fish.

• Algal blooms deplete the oxygen and block the sunlight from penetrating a body of water.

Tags

NGSS.MS-LS2-4