Ключевые слова: biological, biology, character, chemistry, child, childhood, class, classroom, college, cycle, discovery, education, elementary, equipment, experiment, female, flask, girl, glass, graduation, hand, illustration, knowledge, lab, laboratory, learn, learning, lesson, life, medicine, microscope, molecule, person, photosynthesize, plants, pupil, research, school, science, scientific, scientist, student, study, studying, technology, test, tube, university, virus,