Improved First Aid Kit (IFAK) IFAK Benefit Against the Threat The IFAK increases individual soldier capabilities to provide Self-Aid/Buddy-Aid and provides interventions for two leading causes of death on the battlefield, severe hemorrhage and inadequate airway. These capabilities increase soldier survivability during dispersed operations
The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth's surface is called the exosphere.
Without our atmosphere, there would be no life on earth. Two gases make up the bulk of the earth's atmosphere: nitrogen (78%), and oxygen (21%). Argon, carbon dioxide and various trace gases make up the remainder. Scientists divided the atmosphere into four layers according to temperature: troposphere, stratosphere, mesosphere, and thermosphere. The temperature drops as we go up through the troposphere, but it rises as we move through the next layer, the stratosphere. The farther away from earth, the thinner the atmosphere gets.