Deprecated function: Array and string offset access syntax with curly braces is deprecated in include_once() (line 20 of /home/raw3y9x1y6am/public_html/includes/file.phar.inc).
This is a fun science experiment to try the next time you go swimming. It is a very dramatic demonstration of the difference between how sound travels in liquids and gases.
Atoms are far to small to see, but there are ways that we can see evidence of them. One of the easiest ways to explore that at home or in the classroom is by building a cloud chamber.
When I was growing up, lighters made a spark by rubbing a metal wheel across a flint (which was not really made out of flint.) Lighters like this one ignite the flame in a different way. How is the gas ignited?
