You get the keycard when you follow Salerno to the BioDome. As she escapes, she drops the card by the airlock. You will chase her in the rover to the Rock lab, but you also have to have purple eyes to fool the retina scan. You get them when you are at the Research Lab (upper right by the airlock).
To find Salerno, you have to get the tracking device from the Infirmary.
To enter the Rock lab, you need a keycard (dropped by Salerno when you find her) and purple eyes that you can get from the machine in the Research Lab.
When you find Salerno at the BioDome, she escapes through the airlock, and drops her keycard. If you have already turned your eye color to purple to beat the retina scan, you can follow her into the Rock lab.
Only Salerno still has a key card to enter the Rock Lab, but she can apparently get in without one. You only get a keycard when she drops hers at the BioDome. You cannot enter the Rock lab until then. Get the locator device from the Infirmary and you can track her down.
Lunar Colony
The Rock Lab is the last of the three sites you visit on the Moon. To enter you need purple eyes (to fool the retina scan) and a keycard (which only Cdr. Salerno has). Your first stop should be the Research lab, where you can change your eye color and find the tracking device that will locate Salerno. To enter the Infirmary, squash yourself down with the pressure chamber. The locator will lead you to the BioDome, where Salerno is hiding. She escapes but drops her keycard. Chase her in the rover to the Rock lab and go inside.
There are no guards at all on Lunar Colony. PASE doesn't have any money in the budget.
Lunar Colony became the 29th island released in Poptropica (not counting mini-quests) on September 6, 2012.
It is on the back of the lunar rover. To use it, click it and carry the hook to where you need it.
You turn them purple.
There is no electric saw on Lunar Colony. To enter the Infirmary at the Research Lab, climb to the top and use the pressure chamber to temporarily squash you down, then quickly slip past the boxes that are blocking the door. The exit from the Infirmary is in the maintenance area.
It is attached to the back of the lunar rover. To use it, click it and carry the hook to where you need it.
its inside the infermary where maintnace is.