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Elements of the world
The five elements (Indian classification)
Earth, Air, Fire, Water, Sky
These are more like the states of matter
The five senses (personal classification)
Sight, Sound, Taste, Smell, Sense
These are more like the experiences
Scientific classification
Periodic classification of elements, Optics, Thermodynamics, Electricity and Magnetism, Force and Energy, Mechanics
These are more like a discipline involving study of both states and behaviour of nature