Crossword puzzle clue "vaticanologists study them"

POPE, a small freshwater fish, aka ruffe

to pack tightly

NERD, a person obsessed with computers at the expense of human interaction, also NURD

EXAM, an examination

KIDNEY, a bodily organ

LAKE, to sport or play also LAIK

LAVA, molten rock that issues from a volcano

NOTE, to write down