Ключевые слова: background, black, blue, bubble, capacity, centimeter, chameleon, chemical, chemistry, color, concept, cup, decimeter, division, dynamics, education, experiment, figure, flask, fluid, foreground, gas, glass, hydroxide, inorganic, isolated, laboratory, line, liter, manganate, measurement, measuring, milliliter, millimeter, number, permanganate, pink, plastic, potassium, red, redox, scale, school, sodium, soft, sucrose, transparent, utensils, water, white,