Good catch on the resources not having names in game. I'll add a tooltip to each with that info. Essentially it is supposed to be Water, Biomass, and Metal so you basically got it.
I might need to clarify the extractor and resources better in game. The extractor gives an additional resource for each type on the planet. These aren't earned like points each time you play the planet and are more like a supply limit that can be drawn from and spent on advanced buildings and wonders. In your example the planet originally had 1 biomass and the extractor added 1 extra biomass to the planet (Which also adds 1 to the max supply in the production panel). Right now they are mostly useful for getting enough resources to build some of the production wonders. As we balance the game and add in T3 buildings though they should have more utility.