Holt Environmental Science Chapter 11 Water

Fill in the Blank: 
___________ is an example of a watershed (an area of land that is drained by a river) 

• Pathogen 
• Recharge Zone 
• Mississippi River 
• 1972 Clean Water Act

Fill in the Blank 
An area of the Earth's surface from which water percolates down into an aquifer is called.......

• Groundwater 
• Recharge Zone 
  Nonpoint-source pollution 
• Artificial Eutrophication 
• Recharge Zone

Fill in the Blank: 
Most water must be treated to be ______________ or safe to drink. 

• Pathogen
• Surface Water 
• Potable 
• Recharge Zone 

Fill in the Blank....
This type of pollution, ________________, comes from many different sources and is often difficult to identify. 

• Pathogen 
• Organic Matter 
• Nonpoint Source 
• Point Source

True or False 
Eutrophication is always caused by humans

• True 
• False

Groundwater is stored in.... 

• aquifers 
• lakes 
• oceans 
• the center of the Earth 

Ninety-seven percent of the world's water resources are found in.... 

• Fresh water 
• Salt Water 
• Icecaps and Glaciers in the North Pole 
• Goundwater 

Earth's surface water is found in 

• Lakes 
• Streams 
• Rivers 
• All of the Above

Most of the oil that pollutes the ocean comes from 

• Operating boats and personal watercraft
• Spills from oil tankers 
• Runoff from cities and towns 
• Leaking underground storage facilities

The three major global uses of freshwater are 

• Manufacturing goods, wastewater disposal, and irrigation
• Drinking, bathing and Crowing Crops 
• Drinking, manufacturing goods, and generating power
• Residential, agricultural, and industrial