sábado, 7 de marzo de 2015


The law of conservation of energy.
Energy can be neither created nor destroyed but, it can change forms, and it can flow from one place to another.  
What is Energy? 

 The simplest definition of energy is "the ability to do work". Energy is how things change and move. It's everywhere around us and takes all sorts of forms. It takes energy to cook food, to drive to school, and to jump in the air.

http://www.kids.esdb.bg/index.html   http://energyquest.ca.gov/index.html


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