SOL 6.7 water quality indicators

Which of the following are indicators of a healthy water source?

• high nitrates, high pH, and low temperature

• low temperatures, high dissolved oxygen, and neutral pH

• low pH, high nitrates, and low dissolved oxygen

• high turbidity, high dissolved oxygen, and high temperature

Tags

NGSS.MS-LS2-4

What does it mean when a scientist says a lake has high turbidity?

• the water has a lot of particles in it

• the water is very clear

• the water is very basic

• the water can support many organisms

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS1-5

Under which conditions are large numbers of fish in a lake most likely to die?

• right after a storm with heavy rainfall

• when the water's dissolved oxygen is high and temperatures are below 29 degrees Celsius

• when the water's dissolved oxygen is low and temperatures are above 32 degrees Celsius

• when the water's turbidity is low and temperatures are between 29-32 degrees Celsius

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Scientists tested water at a sampling site in the James River watershed. The found that dissolved oxygen dropped to its lowest level in July. What is the most likely cause of the low dissolved oxygen data for July?

• high nitrates

• low turbidity

• high temperatures

• algal blooms

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3

If a substance is neutral, what is its pH?

• 7

• 14

• 0

• 1

Which is an event in which large numbers of fish die as a result of unhealthy water quality?

• fish kill

• algal bloom

• flood

• turbidity

Tags

NGSS.MS-LS2-4

A body of water that has high turbidity is ...

• cloudy
• clear

Tags

NGSS.MS-LS2-3

What is the possible effect of high nitrate level in water systems?

• algal bloom
• fewer algae

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-3

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

• its temperature and pH
• its location and depth

Tags

NGSS.MS-LS2-4

What pH level is best for marine organisms?

• 1.0
• 7.4

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-5