Ключевые слова: bacterium, beaker, black, brain, chemical, chemistry, danger, element, equipment, experiment, explosion, flask, germs, glass, glassware, hazard, health, human, icon, illustration, isolated, lab, laboratory, liquid, magnifying, medical, microbe, microorganism, molecular, molecule, nuclear, particle, pollution, radiation, radioactive, research, safety, science, scientific, set, silver, symbol, test, toxic, tube, virus,