Water Testing

Salinity is...

• the amount of salt in the water

• the amount of dirt in the water

Which best explains why the turbidity increases as water samples are taken closer to the shore?

• Shoreline erosion causes sediment to wash into the lake.

• Sediment is carried from the middle of the lake to the shore by wind.

• Swimmers stir up sediment by splashing in the water near the shore.

• Fish stir up sediment while feeding on plants that grow close to the shore.

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

• 0

• 7

• 10

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 would MOST LIKELY result in an unhealthy aquatic habitat?

• a decrease in turbidity

• a decrease in nitrates levels

• an increase in water temperature

• an increase in dissolved oxygen levels

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which organism would make a good bioindicator?

• an organism that is endangered

• an organism that is tolerant of slight physical or chemical changes

• an organism that has reached its carrying capacity in the ecosystem

• an organism that is not sensitive to slight physical or chemical changes

Water with high turbidity 

• is cloudy and hard to see through

• is clear

Tags

NGSS.MS-LS2-1

A measure of the amount of dissolved salts in a given amount of liquid

• salinity

• bio-indicators

• wave

• tide

What is the primary purpose of water testing in environmental science?

• To determine the pH level of water

• To assess the quality and safety of water

• To measure the temperature of water

• To calculate the water flow rate