1. T HE W ATER C YCLE Applied Chemistry

2. There are 7 steps to the Water Cycle (Hydrologic Cycle) 1.Evaporation – water at the surface changes into water vapor  oceans, lakes, & rivers are the main source of evaporation 2.Condensation – at high altitudes, water vapor changes into tiny particles of ice/water droplets, because the temperature is low  droplets come together to form clouds & fog 3.Sublimation – ice directly converts into water vapor (skipping the liquid phase)  happens in ice sheets in North and South poles; slower than evaporation

3. 4.Precipitation – clouds (condensed water vapors) pour down as precipitation (rain, snow, sleet, hail, drizzle)  caused by wind, temperature change, or when air is full of water 5.Transpiration – water evaporation from plants 6.Runoff – after precipitation, water runs over the surface of Earth 7.Infiltration – precipitation that moves deep into the soil; water seeps down and increases the level of the ground water table  this results in pure, drinkable water

4. Aquifers Aquifers are underground layers of permeable (porous) sand and limestone that contain large quantities of water Village, Town, or City water departments and household wells draw water from aquifers. As water seeps into the soil and becomes groundwater, it picks up small amounts of dissolved gasses, rock, & soil. These are rarely removed, because they are harmless. Some minerals, like Iron, Zinc, or Calcium, may improve water’s flavor.

6. Water Cycle Animation CrashCourse – The Hydrologic Cycle Water Cycle Rap