Lesson 3What is the water cycle?
water vaporwater vapor
gas in form of water
invisible gas
air pressureair pressure• pressure of gas particles against another object
• pushes in all directions
air pressure decreases as you move higher in atmosphere
water cycle• repeated movement of water thru.
environment in different forms
• affected by temp, pressure, wind & elevation
water cycle
precipitation
storage
condensation
evaporation
evaporation liquid water
water vapor
Evaporation video clip
condensation water vapor liquid water (water droplets in clouds or dew)
Condensation video clip
precipitation water falls from clouds- rain, snow, sleet or hail
sublimation ice water vapor w/out melting
runoff water moving downhill
frost water vapor ice crystals w/out forming liquid water
Magic School Bus Water Cycle video clip
Click for Water Cycle Animation
Water Cycle Song
dew
water vapor liquid water(condensation)
condensation water vapor liquid water
runoffwater moving downhill
precipitation (rain)water falls from clouds
sublimation ice water vapor w/out melting
frostwater vapor ice crystals w/out forming liquid water
evaporationliquid water water vapor