To become an operative part of the Constitution, an amendment, whether proposed by Congress or a national constitutional convention, must be ratified by either: 1  The legislatures of three-fourths (at present 38) of the states; or. 2  State ratifying conventions in three-fourths (at present 38) of the states.
But more of that in a second. The Earthâs atmosphere is composed of the following molecules: nitrogen (78%), oxygen (21%), argon (1%), and then trace amounts of carbon dioxide, neon, helium, methane, krypton, hydrogen, nitrous oxide, xenon, ozone, iodine, carbon monoxide, and ammonia.
Planet Earth: Facts About Its Orbit, Atmosphere & Size; Early Earth: A Battered, Hellish World with Water Oases for Life ; Massive Star Explosion Seeded the Early Solar System, Meteorite Study Suggests; How Early Earth Kept Warm Despite Faint Sun; Earth Formed From Diverse Meteorite Mix, Study Suggests