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The first step of the water cycle is evaporation. 

Evaporation is the change of liquid into vapor. 

When the water in lakes, rivers and oceans heat 

up, the water molecules heat up and start 

moving more rapidly causing the water to rise up 

into the atmosphere.  

The second step of the water cycle is 

Condensation. Condensation is the change of water 

vapor into water. After the water has evaporated 

high up into the air, the water cools back down 

making the molecules slow down. This makes little 

droplets of water, then they stick to dust particles 

to form a cloud.

The third step of the water cycle is 

Precipitation. After the water turns into clouds 

it then keeps collecting until the droplets get 

heavier then air, then all the droplets fail to the 

ground causing rain. Precipitation can also be in 

the form of hail, sleet and snow. 

•     There is the same amount of water on Earth as there was 

when the Earth was formed. 

•     Water is composed of two elements, Hydrogen and         

Oxygen. 2 Hydrogen + 1 Oxygen = H2O.

•     Nearly 97% of the world’s water is salty or otherwise 

undrinkable. 

•     75% of the human brain is water and 75% of a living tree 

is water.

•     The average total home water use for each person in the 

U.S. is about 50 gallons a day.

•     Water expands by 9% when it freezes. Frozen water (ice) 

is lighter than water, which is why ice floats in water.

At a Glance

http://www.youtube.com/watch?v=0_c0ZzZfC8c

http://ga.water.usgs.gov/edu/watercycle.html

http://www.cotf.edu/ete/modules/msese/earthsysflr/water.html

http://water.epa.gov/learn/kids/drinkingwater/waterfactsoflife.cfm

http://climap.net/water-cycle

http://www.windows2universe.org/earth/Water/water_cycle.html

http://earthguide.ucsd.edu/earthguide/diagrams/watercycle/

http://peer.tamu.edu/curriculum_modules/Environ_Hazard/module_1/lesson3.ht

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