Hydrosphere Review

What is a correct statement about estuaries?

• They act as a filtering system to remove pollutants from water runoff.

• Prevents saltwater from entering a river.

• It supplies freshwater to lakes.

What does upwelling bring the the surface of ocean water?

• bacteria

• salt

• nutrients

The measure of dissolved salts in seawater is.....

• salinity

• thermocline

• temperature

Correct definition of an estuary would be....

• area that has a watershed

• an area where fresh and saltwater meet

• place with alot of seaweed

Difference between point source and non-point source pollution...

• point source comes from multiple sites, and non-point source comes from one site

• point source comes from one site, and non-point source comes from multiple sites

Pollution in a lake that would cause a low pH

• fertilizer runoff

• leakage from a pipe

• acid rain

Why would high temps reduce amount of fish in a lake?

• high temps lower the pH

• high temps lower the dissolved oxygen

• high temps decrease turbidity

Indicator of a healthy stream

• pH of 13

• pH of 4

• high temperature

• high number of bioindicators

Government agency responsible for making sure water quality is under control

• Food and Drug Administration

• National Oceanic and Atmospheric Association

• Environmental Protection Agency

Which 2 would best determine the health of a body of water?

• temperature and pH

• location and depth

• temperature and depth