Ключевые слова: background, blue, color, concept, copy, education, effort, equipment, experiment, field, flat, force, gravity, horseshoe, induction, iron, lab, laboratory, lay, learn, magnet, magnetic, magnetism, magnets, metal, nature, north, object, physics, pink, polarity, power, red, research, school, science, scientific, shape, south, space, strength, study, text, top, two, view,