Each subject has its own building blocks.

Chemistry – The Periodic Table is a list of all the atoms from which matter is built. Hydrogen, helium, lithium are the first three in the Table. Water is made from two atoms of hydrogen and one atom of oxygen.

Physics - the fundamental particles – quarks, gluons, leptons…
Biology - genes and DNA - mapping the human genome…
Music - notes
Literature - words
Painting - colours