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