Martin Weiss wrote:
>> For a museum laboratory exercise is there an easy test for living
> organisms? For example, if given a sample of soil what test can I have
> visitors perform to determine if there is anything living in it? This
> would be a possible modeling of a probe to Mars for example to look for
> living organisms.
>> Must be SAFE, easy to interpret ie color reaction, and not take more
> than several steps.
Whatever you choose, it is unlikely to model searches for life on Mars
since the tests that have been done on Mars used radioactively labelled
materials. This probably doesn't fit your definition of safe and easy.