Koulupoika katselee punaista nestettä pullossa ja raapiminen pää, joilla ei ole aavistustakaan - Kuvapankin valokuva ja kuva

Little nerd comparing colorful liquids in flasks watching reaction, chemistry

Boy in protective gloves and glasses studying sediments in flask with red liquid

Schoolboy conducting chemical researches and writing reaction result, innovation

Schoolboy looking at chemical substance in test tube, chemistry lesson, hobby

Boy in protective glasses pouring chemical substance in tube, checking reaction

Schoolboy watching reaction in tube with green liquid, chemistry lessons

Female chemist observing reaction holding test tube in hand, experimentation

Female chemist studying presence of sediments in flask with red liquid in lab

Chemistry student mixing liquids in scientific laboratory, conducting experiment

Chemistry experimenter writing down results of scientific researches in lab

Woman scientist holding pipette with liquid and taking test tube with reagent

Chemistry scientist conducting researches in office, holding flasks with liquids