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Freshwater

Science Study Guide

QuestionAnswer
What are methods for the desalination of ocean water? -Evaporating the water, then allowing the vapor to condense. -Freezing the water. -Filtering the water under high pressure.
Using less water so that it will not be used up is called? Conservation.
What is a way to conserve water? Reusing water in a factory to cool hot machinery.
The process of obtaining fresh water from salt water is called? Desalination
The amount of one sunstance in a certain volume of another substance is its... Concentration
The pH of water is a measure of its... Acidity
Pure water has a pH of ... 7
The first step in treating water from a river or lake is usually... Filtration
Why might chlorine be added to drinking water? Chlorine kills disease-causing microorganisms.
What enables water to move through a system of pipes? Water Pressure
Sanitary sewers carry sewage away to... Wastewater Treatment Plants
How do homes with no sewage dispose of sewage? Septic Systems
Specific sources of pollution that can be identified are called... Point Sources
What are major sources of freshwater pollution? -Human and animal wastes -Industrial wastes -Agricultural chemicals
Dr. John Snow discovered a cholera outbreak was caused by drinking water polluted by... Sewage
A water pollutant caused by smoke and exhaust is... Acid Rain
Pesticides are most likely to be found in runoff from... Farm Fields
A pollutant often found in road runoff is... Oil
A drought is a long period of... Less rainfall than normal.
Created by: nglaspey
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