Koulupoika tutkii kemiallista ainetta koeputkessa, kemian oppitunti, harrastus - Kuvapankin valokuva ja kuva

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

School experimenter looking at test tubes with liquids, analyzing reactions

Schoolboy looking at red liquid in flask and scratching head, having no idea

Little nerd comparing colorful liquids in flasks watching reaction, chemistry

Concentrated boy planning to conduct chemical experiment with colored liquids

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

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

Female chemist looking at colored liquids in flasks, developing new substance

Female chemist observing reaction holding test tube in hand, experimentation

Chemistry student mixing liquids in scientific laboratory, conducting experiment

Female scientist comparing flasks with colored liquid, detergent laboratory

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