Anki is a digital flash card app for phones, so I guess they convert whatever they're learning to the Anki format.

Look up Avogadro

Short and on point :)

That's not possible because of the way disk encryption works. When you unlock an encrypted drive, it does not actually decrypt it - that would take way too long and leave the disk unencrypted. Instead, the computer keeps the key in RAM and uses it to decrypt the accessed data blocks on the fly.