hydrosphere

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

• more aquatic life

• less nutrients in the water

• higher water temperature

• fewer nitrates

Which best determines the health of a lake used as a source of fresh water?

• its width

• its temperature and pH

• its 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 surcae near thee ocean

• because pollutants are filtered by rock and soil deep within the Earth

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

• twilight zone

• intertidal zone

• deep ocean

• open ocean

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 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 river flooding

Which factors can have the greatest effect on the health of a river system?

• type of soil and salinity

• nitrate level and turbidity

• human consumption and pH

• natural disasters and tidal changes

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

• Environmental Protection Agency (EPA)

• Food and Drug Administration (FDA)

• National Oceanic and Atmospheric Administration (NOAA)

• Center for Disease Control (CDC)

If your community wanted to build a new landfill (garbage dump), what would be the most important environmental consideration in locating the landfill?

• Cost of the land

• Location of groundwater

• Proximity to industrial areas

• Accessibility to major highways

How would excessive nitrates affect a freshwater system?

• It would cause excessive algae blooms

• It would cause an increase in temperature

• It would cause an increase in dissolved oxygen

• It would cause the water to become extremely cold.