Show:
Hydrosphere
Water treatment
Wastewater is treated and released
Freshwater can be conserved
Health of a Water System
100
Where is most of the fresh water?
In rivers and lakes.
100
Where is water pumped from?
A nearby well dug into an underground aquifer.
100
What is wastewater?
The water that runs down the drain.
100
What three ways can people conserve water?
Use less water; Reuse water; recycle water
100
How do you tell the health of a water system?
temperature, dissolved oxygen, bio-indicators, nutrient pollution
200
What is the gas form of water called?
Water vapor
200
In cities where is water piped in from?
reservoirs
200
What are two ways to treat water?
Sewage and Septic system
200
How does the process of desalination work?
Salt water is evaporated, salt is left behind. the water vapor is condensed and returned to liquid as fresh water.
200
What type of water carries more oxygen?
colder and faster moving water carries more oxygen
300
What are the different forms of water?
Gas, Liquid, Solid
300
What is the concentration of a substance expressed as?
parts per million
300
What is the difference between point- source pollution and non-point source pollution?
Point-source pollution is pollution that enters water from a known source. Non-point source pollution is pollution whose source is hard to find or is scattered.
300
How much more does it cost to use Desalinaton than regular water treatment?
5 times as much
300
What happens when oxygen gets low?
The system can't survive. the biotic factors depend on the sufficient amounts of oxygen.
400
How much of the Earth is salt water (percentage)?
97%
400
Who sets the standards for safe, clean drinking water?
Environmental Protection Agency (EPA)
400
Which two areas of the world have some of the most severe water shortages?
Africa and the Middle East
400
What are three river that are being overused?
Ganges, Indus, Colorado
400
What are two examples of bio-indicators?
frogs and macrointereverterbrates
500
How much of the water on Earth is fresh water (percentage)?
3%
500
Can any amount of treatment make the water safe?
No amount of treatment can make the water safe.
500
What uses 2/3 of the world's available fresh water?
Agriculture
500
How does draining an aquifer destroy it?
Ground can settle closing up the storage space.
500
What are the two biggest contributors to nutrient pollution?
Nitrogen and Phosphorus