Related Clues:

• "Hard" or "soft" subj
• Geol. or chem., e.g
• The "S" of STEM, briefly
• Bot. or ecol
• — -fi movie
• ___-fi conventions
• What ''fi'' may follow
• Ecology or geology: Abbr
• Subj. with labs
• H.S. dept
• Bio., chem., or biochem
• ____Fi
• Sch. study
• Subj. such as ecology
• It may be natural: Abbr