Ключевые слова: adult, analysis, analyzing, beaker, biology, biotechnology, boy, caucasian, chemical, chemist, chemistry, class, classroom, cognition, concentration, confidence, discovery, education, elementary, experiment, happiness, highschool, horizontal, indoor, intelligence, knowledge, lab, laboratory, learning, lesson, liquid, medicine, microscope, person, pupil, research, school, schoolgirl, science, scientific, scientist, smart, student, study, studying, teacher, teenager, tube,