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.
Atmosphere A planet's climate is decided by its mass, its distance from the sun and the composition of its atmosphere. Earth's atmosphere is 78% nitrogen, 21% oxygen, and 1% other gases.Carbon dioxide accounts for just 0.03 - 0.04%.tmosphere A planet's climate is decided by its mass, its distance from the sun and the composition of its atmosphere. Earth's atmosphere is 78% nitrogen, 21% oxygen, and 1% other gases.