Crosswordiee.com

% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Phys. or chem. 3 letters:

SCI: Chem. or phys.
SCI: Phys. or chem.
SCI: Bio., chem. or phys.
SCIS: Chem., phys., biol., etc.
SCIS: Chem. and phys.