Section 1: Water Resources
What percent of freshwater is there on Earth?
3%
According to the WHO, how many people lack access to freshwater on Earth?
1 billion
____________ is fresh water on Earth’s land surface.
surface water
_________ __________ is one way that we can help ensure that everyone will have enough water at a reasonable price.
water conservation
Describe step no. 2 of water treatment process.
coagulation: alum is added to filtered water and flocs form. these flocs settle to the bottom after spinning.
Why are recharge zones environmentally sensitive areas?
Because any pollution in the recharge zone can also enter the aquifer.
what are the three major uses for freshwater on earth?
agricultural, industrial, and residential
As streams and rivers move across the land, they form a flowing network of water.
river system
Most water must be treated to make it________, or safe to drink.
potable
What are three ways to conserve water?
1. less time showering
2. turn off faucet when brushing
3. load full dishwasher
4. reuse water for cleaning such as carwash
etc.
True or False
Impermeable rock can be porous or nonporous, but only permeable rock allows water to pass through it.
True
At power plants, why is water use important in industry?
To cool towers and release steam.
Water stored beneath the Earth’s surface in sediment and rock formations.
groundwater
Water treatment also removes _____________, which are organisms that cause illness or disease.
pathogens
perforated tubing system for water conservation in agriculture
drip irrigation system
what is the difference between a well and an aquifer?
Aquifer is natural water source formation. Well is a manmade water source.
On the global scale, water is used most for which of the three major categories?
agriculture
__________ is a method of providing plants with water from sources other than direct precipitation.
irrigation
The earliest form of _________ probably involved flooding fields with water from a nearby river.
irrigation
Surface water v. groundwater. Which one needs more filtration and why?
surface water because its surface is exposed to air pollution and other contaminants.
If you are digging a well, what should you do in order for your well to not run dry?
Dig past the water table.
1. first filtration
2. coagulation
3. second filtration
4. chlorination
5. aeration
6. additional treatment
_________________ is the process of removing salt from salt water.
Desalination (DEE SAL uh NAY shuhn)
Double Jeopardy:
A ______ is a structure built across a river to control the river’s flow. When a river is dammed, an artificial lake, or _______, is formed behind the dam.
dam
reservoir
What does the saying "we all live downstream" mean or suggest?
At downstream, all the contamination is collected. This saying a reminder to be mindful of water pollution.