Likely a sterile medium means an uncontaminated culture (food free of living organisms) that will grow only the new bacteria introduced for analysis. Source(s): http://www.thefreedictionary.com/sterile
Stonepelt was Bluestar's first mentor and a very well-respected senior warrior of ThunderClan. It is revealed in this book that he took her to the Gathering on her second day as an apprentice because she had caught a squirrel very well for a new apprentice, and the squirrel had been as big as she was.
What I mean by warrior cat names are names from the warrior cats series (i.e. fireheart, thornclaw, brightheart, cloudtail, etc.) Update: I need it for my cats. Update 2: I don't have that many cats, but I like a big list! Update 3: They need to be names clan leaders would name warriors! Update 4: I meant made up warrior cat names.