Hydropshere

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 best explains why the water cycle mostly occurs over the ocean?

• Most of Earth's water is located in the oceans.

• Salt water evaporates more quickly than freshwater.

• The temperatures over the oceans are cooler than over land.

• The temperatures over the oceans are warmer than over land.

Which is the source of most drinking water in the world?

• lakes

• rivers

• springs

• polar ice caps

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

Why is water from an aquifer more likely to be cleaner than water from other sources?

• because it forms where fresh and salt water meet

• because it receives water directly from precipitation

• because it rises to the surface near the ocean

• because pollutatnts are filtered by rock and soil deep within Earth

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

• oceanic

• intertidal

• deep ocean

• open ocean

In the United States, which is responsible for ensuring the safety of the country's drinking water?

• Envionmental Protection Agency (EPA)

• Food and Drug Administration (FDA)

• National Oceanic and Atmospheric Adminstration (NOAA)

• Center for Disease Control (CDC)

Which best describes the characteristics of a river basin?

• the land drained by a river and its tributaries

• the land formed when rivers create estuaries and marshes

• the land at the mouth of a river where water flows into the ocean

• the land formed as a result of a river flooding

Under which conditions are large numbers of fish in a lake most likely to die?

• right after a storm with heavy rainfall

• when the water's dissolved oxygen is high and temperatures are lower than average

• when the water's dissolved oxygen is low and temperatures are higher than average

• When the water's turbidity is low and temperatures are in the average range

A clear example of point-source pollution

• trash floating in ocean water

• feedlot wastes in a river

• oil spilling from a supertanker

• salts from irrigation