Why does Safari keep crashing on my iPod Touch?

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My iPod Touch (4th Gen) runs ios version 6.1.6 & Safari keeps crashing. It'll load a page then crash to a black screen within a few seconds to a minute or two (usually just a few seconds though). I also have the same problem when trying to run iTunes (always) & sometimes Facebook & Instagram too. I have roughly 3% (9.9MB of 249.0MB) RAM Memory free (though this fluctuates from 1% to 4%) & currently approx 45 Processes running. Under Settings>General>About>Diagnostics & Usage> D & U Data I've noticed many mentions of 'Latest Crash' & 'Low Memory'.

Does any of this have anything to do with Safari crashing, or is it something else?

Any help to rectify this would be greatly appreciated.

Thanks!

Elaine :)