Ключевые слова: antenna, astronomy, atom, biology, book, bottle, caliper, cell, chemical, chemistry, clipboard, dna, dropper, education, experiment, geography, glasses, globe, graduate, growth, icon, idea, isolated, learning, lightbulb, magnet, magnifying glass, microscope, molecule, nature, physics, pipette, planet, plant, radio, radio microphone, radioactive, reaction, research, ring, rocket, satellite, science, set, silhouette, student, syringe, telescope, test tube,