Hydrosphere

Most of Earth’s freshwater is found in

• groundwater and soil mixture

• groundwater and rivers

• rivers and atmosphere

• groundwater and glaciers

Irrigation methods are used to

• water crops

• provide to household water

• mine for gold

• flush septic systems

Aquaculture produces

• fish

• crops

• forest

• livestock

What two substances in farm fertilizers contribute to surface water pollution?

• nitrogen and phosphorous

• hydrogen and helium

• iron and calcium

• arsenic and cyanide

Eutrophication is caused by

• phosphorous pollution

• fecal pollution

• sewage pollution

• thermal pollution

Surface water accumulates in

• the soil

• groundwater

• rivers

• lakes and wetlands

Surface water quality is judged by these surface water pollution indicators

• dissolved oxygen levels

• nitrates and phosphate totals

• fecal coliform

• all of these

The chief surface water pollutant in North Carolina is

• fecal

• sewage

• thermal

• sediment

The cause for salt water intrusion into freshwater groundwater is

• spring tides

• excessive coastal well water discharge

• ocean tidal change

• hurricanes

The loss of wetlands leads to

• all of these

• increased soil erosion

• loss of plant and animal diversity

• more land available for crops