Keywords
13-18 years, 14-15 years, 14-16 years, 2, 3, adolescent, blonde, bright-haired, brown-haired, chemical, chemistry, clothing, color, colour, dark-haired, day, differential focus, education, european, experiment, female, female pupil, female teenager, female teenager only, filling, flask, focus, focus on the center, glass flask, glove, hair, hair colour, hair length, hair of the head, hairstyle, horizontal, indoor, institution of education, lab coat, laboratory, liquid, material, medium long hair, mid section, multicoloured, natural science, number, object, outerwear, part of, pedagogics, person, petri dish, photograph, protective glove, protective wear, puberty, pupil school, research, research establishment, safety goggles, science, side by side, sitting, surgical glove, teenager only, test tube, time of day, two persons, vertical, view from below, waist up, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, 2810020