ESS 3.1

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-ESS3-4

NGSS.MS-LS2-1

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

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-LS1-5

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-LS2-3

NGSS.MS-LS2-4

Which groundwater contaminant contained in fertilizers and pesticides comes from farms?

• bacteria

• mercury

• nitrates

• sodium

Which would most affect the health of fish in a local pond?

• The daily release of hot water into the pond from a local factory.

• A storm temporarily stirring up water and sediments in the pond.

• The occasional erosion of sediments into the pond from a nearby field.

• A slight increase in the number of people who fish in the pond for food.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which is most likely to happen when river water temperature rises above 35°C?

• The water will become polluted.

• The dissolved oxygen levels will increase.

• There will be negative health effects on wildlife.

• There will be decreased evaporation from the river.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

A recreational lake experiences eutrophication because of excess nutrients. Based on this information, how would the recreational lake most likely appear?

• clear and blue

• oily and greasy

• murky and full of algae

• orange and rust-colored

Which is a bioindicator?

• current

• insect

• rock

• water

Why do biologists use indicator species?

• to compare freshwater and ocean ecosystems

• to count the number of organisms present

• to monitor water quality and biodiversity

• to analyze the dominant species