Μαθήτρια σε προστατευτικά γυαλιά που κατέχουν φιάλη με χημική δείγμα - Φωτογραφίες & Εικόνες Αρχείου

Schoolgirl in protective goggles holding flask with chemical sample

Little girl wearing lab coat and protective glasses holding flask with green reagent

Kids in protective glasses and lab coats making experiment in chemical laboratory

Schoolgirl in protective goggles holding flask with chemical sample

Little girl wearing lab coat and protective glasses holding flask with green reagent

Excited schoolgirl in fume after chemical experiment in scool lab

Schoolgirl holding flask with chemical sample while sitting in lab

Curly schoolboy in protective goggles looking at flasks and tubes

Little girl wearing lab coat and protective glasses holding flask with blue reagent

Schoolgirl in protective goggles holding flask with chemical sample

Schoolchild in lab coat and protective goggles looking at flask with green sample

Little girl in white coat sitting on table and holding clipboard in science laboratory

Curly schoolboy studying with tubes in chemical laboratory

Schoolgirl in protective goggles looking at test tubes in lab

Little boy wearing lab coat making notes in clipboard in science laboratory

Little boy wearing lab coat in science laboratory

Preteen schoolboy in lab coat looking at sample in test tube