By Shana Trotter

Earth’s Water
 Limited Supply
 Never new water, always the same
 Water cycle allows us to have water

Three States
 Solid
 Liquid
 Gas

Water Cycle Overview

Evaporation
 Water changes from liquid to gas
 Water vapor collects in the air
 Evaporates from lakes, oceans, puddles, etc.

Evaporation Experiment
 Step 1: fill a glass measuring cup with water
 Step 2: wait one day and mark the new water level
 Step 3: repeat step 2 over several days and compare the
new water level to the original level
 You will see evaporation!

Condensation
 Water vapor in the air changes from a gas to a liquid
 Cool temperatures cause this
 The liquid collection forms clouds

Condensation Experiment
 Step 1: fill a glass with ice
 Step 2: let it sit on the counter for a few minutes
 Step 3: observe the water droplets that appear on the
outside of the glass
 How did they get there?
 Condensation

Precipitation
 Clouds can only hold so much water
 They get heavy and the water must leave
 Forms
 Rain
 Sleet
 Snow
 Hail

Forms of Precipitation
 http://www.youtube.com/watch?v=kFFHo4T-g4E

Collection
 Water falls back to earth and could land
 In oceans, lakes, rivers, etc.
 On land
 Water on land may runoff into a body of water or
become groundwater

Groundwater
 Water that seeps into the ground following
precipitation

Sources
 Slide 3 Water Cycle Diagram:
http://www.kidzone.ws/water/
 Slide 5 Picture: ga.water.usgs.gov
 Slide 6 Picture: melindahinsonneely.com
 Slide 8 Picture: etc.usf.edu
 Slide 10 Video: uploaded by afreshour
http://www.youtube.com/watch?v=kFFHo4T-g4E
 Slide 11 Picture: lvwash.org
 Slide 12 Picture: myteacherpages.com
 Slide 13 Animation: cnobleza.wordpress.com