The Hydrologic Cycle
This process moves water from liquid to gas.
What is evaporation?
The first stage where large objects are removed using screens.
What is preliminary treatment?
Pollution that comes from a single, identifiable source.
What is point source pollution?
The largest user of freshwater globally.
What is agriculture?
Wetlands act as natural ___ for water.
What are filters?
Water vapor turning into clouds is called this.
What is condensation?
The stage where solids settle out in a sedimentation tank.
What is primary treatment?
Pollution that comes from many diffuse sources like runoff.
What is nonpoint source pollution?
Technique that delivers water directly to plant roots.
What is drip irrigation?
Primary producers in aquatic ecosystems.
What is phytoplankton?
Water that flows over land into rivers and streams.
What is runoff?
Bacteria break down organic matter in this treatment stage.
What is secondary treatment?
The largest source of water pollution in the U.S.
What is nonpoint source pollution?
A structure built to control floods and generate electricity.
What is a dam?
This ecosystem protects coastlines and supports biodiversity.
What are wetlands or mangroves?
Water stored underground in soil and rock.
What is groundwater?
This process uses oxygen to help bacteria decompose waste.
What is aerobic digestion?
Water pollution that raises temperature and lowers oxygen levels.
What is thermal pollution?
Removing salt from seawater for drinking use.
What is desalination?
The loss of wetlands increases this risk.
What is flooding?
The movement of water from soil into plant roots.
What is transpiration (or uptake)?
The solid material left after sewage treatment.
What is sludge?
This law regulates water pollution in the U.S.
What is the Clean Water Act?
Law that regulates surface water quality in the U.S.
What is the Clean Water Act?
Coral bleaching is caused mainly by this stressor.
What is increased water temperature?