A. The earth has a limited amount of water.  
  1.That water keeps going around and around in 
  what we call the "Water Cycle.”
  2.The water cycle is important because it gives us 
  fresh water.
  3. Energy from the Sun drives the water cycle.
  B. This cycle is made up of a few main parts:
  1. evaporation
  2. condensation 
  3. precipitation 
  4. Transpiration
  5. Runoff
    B. Evaporation- Liquid to 
    Gas
   1. Evaporation is when the sun 
     heats up water in rivers or 
     lakes or the ocean and turns it 
     into vapor or steam. 
   2. The water vapor or steam 
     leaves the river, lake or ocean 
     and goes into the air. 
   3. Water to 
       Water Vapor
   C. Condensation- Gas to
   C. Condensation- Gas to
    Liquid
    Liquid
   1. Water vapor in the air gets cold 
   1. Water vapor in the air gets cold 
    and changes back into liquid, 
    and changes back into liquid, 
    forming clouds. This is called 
    forming clouds. This is called 
    condensation. 
    condensation. 
   2. Example: the droplets that form 
   2. Example: the droplets that form 
    on the outside of a cold glass. 
    on the outside of a cold glass. 
   3. The Water vapor condensed into 
   3. The Water vapor condensed into 
    water droplets.
    water droplets.
        D. Precipitation
        D. Precipitation
  1. Precipitation occurs when so much water has 
   condensed that the air cannot hold it anymore. 
  2. The clouds get heavy and water falls back to the 
   earth in the form of rain, hail, sleet or snow.