Intro Earth and Human Activity ESS8.3

Which chemical factor best indicates safety and potability of the water supply?

• turbidity

• temperature

• bioindicators

• dissolved oxygen

Which factors would tell scientists that a local stream is safe and healthy?

• The nitrates are high and the turbidity is low.

• The pH is high and the dissolved oxygen is high.

• The dissolved oxygen is low and the turbidity is high.

• The dissolved oxygen is high and the temperature is low.

Which best describes how humans can be good stewards of the hydrosphere?

• by watering grass every day

• by taking shorter daily showers

• by washing multiple small loads of laundry

• by spraying pesticides daily to control pests

Tags

NGSS.MS-ESS2-4

How is the number of individuals in a biological indicator species population related to the health of the water system?

• If the number of individuals shows a steady decline, the health of the water system is also declining.

• If the number of individuals shows a steady increase, the pollution in the water system is also increasing.

• As the number of individuals increases, the population becomes a better biological indicator species.

• As the number of individuals decreases, the population becomes a better biological indicator species.

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-5

Which is most likely to happen to a water supply in an area where acid rain falls consistently for several years?

• The pH of the water supply will increase.

• The pH of the water supply will decrease.

• The turbidity of the water supply will increase.

• The turbidity of the water supply will decrease.

Tags

NGSS.MS-PS1-2

Which explains how the dissolved oxygen in a body of water would change?

• If bacteria in the body of water increased, the dissolved oxygen level would increase.

• If drought near the body of water increased, the dissolved oxygen level would increase.

• If the temperature of the body of water decreased, the dissolved oxygen level would increase.

• If the movement of the body of water decreased, the dissolved oxygen level would increase.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which would most likely increase the amount of dissolved oxygen in a lake?

• increased amount of organic material

• increased turbidity due to sediment

• increased movement of the water

• increased water temperature

Which factor would most likely be examined to determine whether increased runoff was occurring into a body of water?

• pH

• turbidity

• bioindicators

• dissolved oxygen

Which happens when there is a decrease in the amount of dissolved oxygen in an aquatic ecosystem?

• The turbidity increases.

• The type of sediment changes.

• The temperature of the water decreases.

• The type and number of aquatic bioindicators changes.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2

Which regulation will most likely help maintain water quality and the good health of humans?

• a law that will increase aquaculture farms

• a law that will reduce waste storage standards

• a law that will limit pesticide use by local farmers

• a law that will increase commercial fishing permits

Tags

NGSS.MS-LS2-5