LESSON 1

• WATER


  a colorless, transparent, odorless liquid
• What does water form?

  seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.
• Unique properties of water

  • polar
  • excellent solvent
  • has high heat capacity
  • has high heat of vaporization
  • has cohesive and adhesive properties
  • less dense as a solid than as a liquid
• Physical properties of water are related to the: appearance of water

  • color
  • temperature
  • turbidity
  • taste
  • odor
• Water is found in three states
• Water is found in three states

  • solid
  • liquid
  • gas
• The distribution of water on the Earth's surface is ____.

  extremely uneven
• Only ___ of water on the surface is fresh

  3%
• the remaining 97% resides in the ___

  ocean
• Of freshwater, __ resides in glaciers

  69%
• Of freshwater, __ underground

  30%
• Of freshwater, less than 1% is located in ____.

  lakes, rivers, and swamps.
• a continuous body of salt water


  ocean
• is contained in an enormous basin on Earth's surface.

  ocean
• Largest area and volume of water

  ocean
• Contain more than 97% of the earth’s water.


  ocean
• ocean is can be used after ____.

  desalinated
• contains more than 90% of fresh water


  ice and snow
• ice and snow contains more than 90% of ____

  fresh water
• ice and snow situates mostly in ____

  Antarctica, Greenland and other snow mountain.
• precipitation in the form of ice crystals.


  snow
• snow is precipitation in the form of ____

  ice crystals.
• is the solid form of water

  ice
• Ice is obtained by ____

  freezing water.
• is the water found underground in the cracks and spaces in soil, sand and rock.

  groundwater
• groundwater is the water found underground in the ____

  cracks and spaces in soil, sand and rock.
• water in the rock and soil layer beneath the Earth’s surface

  groundwater
• It is stored in and moves slowly through geologic formations of soil, sand and rocks called aquifers.


  groundwater
• Groundwater is stored in and moves slowly through ____

  geologic formations of soil, sand and rocks called aquifers.
• absorb excess rain-off rain and snow on ground

  ground water
• readily available for use and drinking

  ground water
• any relatively large body of slowly moving or standing water that occupies an inland basin of appreciable size


  lakes
• Lakes are created from variety of geological events:

  • tectonic-basin lake
  • volcanic lake
  • glacial lake
  • ground water discharge lake
• Lakes generate water from:

  • collection of water from low areas
  • natural or man made dam
  • rivers and stream
  • groundwater
• bodies of flowing surface water driven by gravity 


  rivers and streams
• connect with each other in a system called a watershed.


  rivers and stream
• body of freshwater that flows downhill in a channel.


  stream
• are areas of land where water covers the surface for at least part of the year.


  wetland
• are parts of our landscape that are defined by the presence of water.


  wetlands
• wetland plays vital roles in:

  • erosion protection
  • flood reduction
  • ground water replenishment
  • water purification
  • providing habitat