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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

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NGSS.MS-ETS1-2

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

• True

• False

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NGSS.MS-PS3-4

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

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NGSS.MS-PS1-2

A variable is any factor that affects the scientific investigation.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS2-2

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

• True

• False

Tags

NGSS.MS-PS2-2

Which best explains how nutrients, salt, sediment and pollutants get into estuaries and oceans?

• from precipitation falling over the estuaries and oceans

• from organisms living and dying in estuaries and oceans

• from rivers and streams flowing into estuaries and oceans

• from asteroids and comets impacting Earth at estuaries and oceans

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NGSS.MS-ESS2-4

Which accurately describes the relationship between nutrients and life-forms in an estuary?

• As nutrients increase, the number of life-forms increases.

• As nutrients decrease, the number of life-forms increases.

• As nutrients increase, the number of life-forms stays the same.

• As nutrients decrease, the number of life-forms stays the same.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Turbidity measurements were taken at different distances from the shore of a lake.

• 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.

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NGSS.MS-LS1-5

NGSS.MS-LS2-3

Which aquatic environment would benefit the most from reduced runoff from lawns treated with fertilizers?

• lakes

• estuaries

• rivers and lakes

• estuaries and lakes

Tags

NGSS.MS-LS2-5