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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

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.

Tags

NGSS.MS-LS2-3

The diagram below shows relative impact of nonpoint source pollution.
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-LS2-4

NGSS.MS-LS2-5

Which best explains why water quality standards have been created to ensure heavy metals in water are kept to a minimum?

• Heavy metals are linked to toxicities in humans and large amounts of heavy metals should not be consumed.

• Heavy metals can stain ceramic surfaces in homes and cost the homeowners hundreds in repairs.

• Heavy metals can cause discoloration of water and can cause a strong unpleasant odor.

• Heavy metals can corrode pipes and cause problems with internal plumbing.

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 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

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

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.

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