About 21% of the atmosphere
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AnswerCrossword Clue
OXYGENAbout 21% of the atmosphere
OXYGENRoughly 21% of the atmosphere
ARGONAbout 1% of the atmosphere
ARGONAbout 1% of the Earth's atmosphere
ARGONAbout 1 percent of the atmosphere
ARGONAbout 1 percent of the Earth's atmosphere
stratospherea region of the atmosphere beginning about 41/2 to 10 miles up, in which temperature does not fall as altitude increases
stratospheresSTRATOSPHERE, a region of the atmosphere beginning about 41/2 to 10 miles up, in which temperature does not fall as altitude increases
stratosphereThe layer of the earth's atmosphere above the troposphere, extending to about 50 km above the earth's surface (the lower boundary of the mesosphere)
troposphereThe lowest region of the atmosphere, extending from the earth's surface to a height of about 6รป10 km (the lower boundary of the stratosphere)
mesosphereThe region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude
ecospherethe part of the atmosphere in which it is possible to breathe normally without aid: the portion of the troposphere from sea level to an altitude of about 13,000 ft. (4000 m)
caloriethe amount of heat required at a pressure of one atmosphere to raise the temperature of one gram of water one degree Celsius that is equal to about 4.19 joules abbreviation cal called also gram calorie small calorie
ionosphereThe layer of the earth's atmosphere that contains a high concentration of ions and free electrons and is able to reflect radio waves. It lies above the mesosphere and extends from about 50 to 600 miles (80 to 1,000 km) above the earth's surface
ionospheresThe layer of the earth's atmosphere that contains a high concentration of ions and free electrons and is able to reflect radio waves. It lies above the mesosphere and extends from about 50 to 600 miles (80 to 1,000 km) above the earth's surface