Ключевые слова: age, autumn, back, boy, chemistry, child, childhood, class, classroom, copyspace, dangerous, day, diligent, education, equipment, experiment, explosion, flask, funny, glasses, hands, happy, homework, information, invention, kid, knowledge, lab, laboratory, learn, lesson, little, male, man, pupil, school, schoolboy, science, scientist, shock, smart, smiling, smoke, student, study, test, year, yellow, young,