E

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

Tags

NGSS.MS-LS2-3

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

In which oceanic zone do clams and crabs survive by burrowing in the sand?

• Oceanic

• Intertidal

• Deep Ocean

• Open Ocean

How is the amount of oxygen in ocean water affected by temperature?

• The amount of oxygen in ocean water increases as temperature increases.

• The amount of oxygen in ocean water increases as temperature decreases.

• The amount of oxygen in ocean water decreases as temperature decreases.

• The amount of oxygen in ocean water is kept constant as temperature decreases.

Which provides the largest source of dissolved oxygen in the ocean?

• Coral Reefs

• Tidal Action

• Algal Growth

• Hydrothermal Vents

Tags

NGSS.MS-LS1-6

A small city gets its drinking water from the river running through its center. This river is fed by rivers that flow down the mountains nearby. How would excessive rainfall in the mountains most likely affect the turbidity of this local water source?

• Heavy rainfall would decrease the turbidity of the river downstream.

• Heavy rainfall would increase the turbidity of the river downstream.

• Heavy rainfall would increase the turbidity of only rivers upstream.

• Heavy rainfall would decrease the turbidity of only rivers upstream.

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 changes

Tags

NGSS.MS-ESS3-4

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 a lot of chemicals.

Tags

NGSS.MS-LS2-5

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

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.

Tags

NGSS.MS-LS2-1