SC 6 N 1 2

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

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

• 0

• 7

• 10

Which best explains why a scientist would use nets to capture and count organisms in a river?

• to measure pH

• to measure turbidity

• to measure biodiversity

• to measure temperature

Tags

NGSS.MS-LS2-5

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

Which is the greatest impact of large quantities of sediment flowing into North Carolina’s rivers and streams?

• Sediment poisons fish.

• Sediment prevents light from reaching plants.

• Sediment interferes with the ability for fish to find mates.

• Sediment increases the depth of rivers and streams, reducing the amount of flowing water.

Tags

NGSS.MS-LS2-4

The scientific method is a process of solving problems in a systematic manner.

• True

• False

Experimenting is a way to test if the hypothesis answers the problem.

• True

• False

Tags

NGSS.MS-PS1-2

In order for a hypothesis to be testable, scientists need to be able to carry out investigations that will either support or disprove it.

• True

• False

Tags

NGSS.MS-PS2-2

A variable is any factor that affects the scientific investigation.

• True

• False

Tags

NGSS.MS-PS2-2

An independent variable is a factor that is changed in an experiment.

• True

• False

Tags

NGSS.MS-PS2-2