Dark thunder clouds
Name: Mary B Olijr
Why are thunder clouds a dark color?
Thunder clouds are very thick - they tower up to eight or nine miles from the
earth's surface. They appear dark on the bottom because light cannot get
through from the top all the way down to the bottom, which is the part you see
when you look up at them. If you take a sheet of paper and put it against a
window, you can see light through the paper. If you put another sheet of
paper on top you cannot see as much light as before, and if you put a thick
pad of paper up to the window, you cannot see any light at all - the side you
see is completely dark. It is the same with clouds: thin ones are light but
thick ones are dark.
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Update: June 2012