water: hydrologic cycle and human use

The process of evaporation and condensation purifies water naturally.

• true

• false

Some lakes have rivers and streams as tributaries but have no outlets, loosing water mainly through evaporation. Over time, the lake will become saltier.

• true

• false

A warming environment will have little to no effect on the hydrologic cycle.

• true

• false

The greatest worldwide use of water is for human consumption.

• true

• false

During the wastewater treatment process, grit and gravel are removed to prevent damage are removed to prevent damage to the pumps that are needed to move water through the treatment plant.

• true

• false

A sludge digester at a wastewater treatment facility produces biogas (methane).

• true

• false

Saltwater intrusion occurs in coastal regions where the water table is falling.

• true

• false

Leaking underground storage tanks found at gas stations have been a significant source of groundwater contamination.

• true

• false

Eutrophication is the result of elevated oxygen levels in our waterways.

• true

• false

Most of the water on Earth is found in

• lakes and rivers

• polar ice caps

• glaciers

• oceans