Answers

2014-09-10T18:24:40+08:00
Sun heats the earth's surface. 
The surface heats a shallow layer of air above it through conduction. 
Convection lifts the heated air away from the surface where it's cooled and sinks back to the surface.
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2014-09-10T19:27:26+08:00
Simple answer.,we have metalic particles existing in our whole body especially in luquids.
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