Atmosphere structure

• Atmosphere is one of the 4 life support systems
• Atmosphere is a thin layer of a mixture of gases surrounding earth, it is held in place by gravity
• The atmosphere is a turbelent gaseous envelope around earth
• The atmosphere is essential for life
• The atmosphere provides vital life support systems such as protection from solar radiation, aids in the transport of energy
• Atmospheres composition is 78% nitrogen, 21% oxygen, 1% other gases such as CO2
• Water vapour in the atmophere varies
• Envelope of gas surrounding earth changes from the ground up
• Distinct layers are identified by thermal characteristics, chemical composition, movement and density
• Between the troposphere and stratosphere is the tropopause
• Troposphere is the lower layer which is a turbulent layer of gas
• Most weather occurs in the troposphere
• Troposphere is warmed by infrared from earth's surface carried up by convection currents
• The density of gases decrease as height increases within the troposphere
• Pressure and temperature decrease with altitude in the troposphere
• Stratosphere layer holds 19 percent of atmospheric gases but very little water vapour
• Temperature increases with altitude in the stratosphere
• Heat is produced by the formation of the ozone layer
• Planes fly In the stratosphere due to reduced turbelence
• The ozone layer has the chemical symbol O3
• O3 is poisonous and a hazard in the troposphere
• Ozone aborbs UV radiation preventing some from reaching earth
• Mesosphere gases are thick enough to slow down meteors
• Mesosphere contains charger particles that absorb harmful gamma and UV radiation
• Particles in the mesosphere reflect radio waves this allows radio signals to travel around earth
• Thermosphere gases are thin and become denser when they descend
• Incoming high energy UV and x-ray radiation begins to be absorbed by molecules in the thermosphere
• Incoming high energy UV and x-ray radiation begins to be absorbed by molecules in the thermosphere
• The thermosphere would still feel very cold despite having a high temperature. The temperature refers to the energy absorbed by the molecules however there are little molecules
• Charged particles just. The thermosphere absorb gamma and UV radiation
• Exosphere is the outermost layer of the atmosphere
• Atoms ans molecules escape into space and orbiting satellites
• Bottom of exosphere is a transition layer called the thermospause