AT LEAST NINETY-NINE PERCENT OF THE ATMOSPHERE'S TOTAL MASS IS CO...

500. - LUYEN THI TOIEC 870 CAU TRAC NGHIEM
LUYEN THI TOIEC 870 CAU TRAC NGHIEM
500. At least ninety-nine percent of the atmosphere's total mass is contained within a distance of fifty miles A B C Dabove the Earth.