Subject: How do radio waves carry information? How do they help a speaker make soun

These questions come from a very bright 4th grade student of mine.  He wants 
his answers on the most essential level.  I have searched this site for 
answers earlier this spring, as well as provided a variety of materials.  
Those on his reading level describe the info in too general terms--do not 
really specify HOW or WHAT is really involved in radio waves and their being 
received (in terms of charges etc).  The high school material I found was too 
difficult for him.  This boy has a deep mind and wants the answers to clearly 
describe the essentials of how radio waves work and how they are received in 
language he can understand. He is trying to truly understand radio waves and 
how they function.  He already built a radio, but continues to question.

Re: How do radio waves carry information? How do they help a speaker make soun