matter - substance that has mass, gas - 3rd state of matter, plasma - the fourth state of matter, formed from a gas that is heated and charged, ionization - occurs in gases at low pressures when an electric current is passed through them, proton - positive charge, electron - negative charge, hydrogen - flammable gaseous substance that is the simplest member of the family of chemical elements, atoms - first matter ever, elements - found in periodic table, protostars - very young star, plato - Greek philosopher, student of Socrates, and founder of the Academy, empedocles - Greek pre-Socratic philosopher and a native citizen of Akragas, abundance - how elements are common compared to other elements, chemistry - the branch of science that deals with the identification of the substances, isotopes - forms of an element that have different numbers of neutron, bigbang - theory of how universe are formed, potassium  - 19th element in the periodic table, oxygen - a colorless, odorless, tasteless gas essential to living organisms, carbon - chemical element that forms more compounds than all the other elements combined., mass - amount of matter in an object,

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