Earth Systems Test Review

Which will most likely result if there is increased upwelling in a coastal area?

• more aquatic life

• less nutrients in the water

• higher water temperatures

• fewer nitrates

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

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.

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

• oceanic

• intertidal

• deep ocean

• open ocean

Which effect does fertilizer runoff have on North Carolina lakes and streams?

• The fertilizer causes some organisms to thrive, but hurts others.

• The fertilizer causes the water to become hotter, killing certain fish.

• The fertilizer causes fish to become sterile, preventing them from spawning.

• The fertilizer causes the water to become over-oxygenated, killing aquatic plants.

In which location would fishermen most likely catch a greater number of fish?

• at the shoreline

• in an upwelling

• in the intertidal zone

• on the deep-ocean floor

Which is the most likely effect of too much nitrogen and phosphorus flowing into a lake?

• algal blooms

• greater salinity

• decreased turbidity

• lower temperature

Which hazard must submersible vehicles overcome while exploring and studying the deep ocean zone?

• high waves

• increased salinity

• high water pressure

• under water mountain ranges

Which contributes most in supporting life on the deep ocean floor?

• cold water temperatures

• extreme water pressure

• hydrothermal vents

Which is a bioindicator?

• current

• rock

• insect

• water