Atmosphere The layer of gases that surround the Earth. thicker at the innermost radius around Earth and it becomes thinner towards outer space.
Layers of the atmosphere There are 4 layers in the atmosphere They are the troposphere, stratosphere, mesosphere, thermosphere which contains the ionosphere and exosphere
Troposphere(0-10km) This is the layer that is closest to the surface of the earth Temperature decreases with altitude This is the layer where life exists; where weather occurs.
Stratosphere(10-25km) This layer sits on top of the troposphere This layer contains the ozone layer, O 3 which protects us from harmful UV rays which can damage cells
Mesosphere(25-85km) This layer is above the stratosphere Temperature decreases with altitude This is where we see "falling stars" – meteors burning up as they fall to Earth
Thermosphere(85-400km) This is the highest layer of the atmosphere The interesting facts about the atmosphere is that the temperature in the thermosphere increases and it can be higher than 2732º F (1,500º C).
Ionosphere(85-200km) the northern lights (aurora borealis) occur because free electrons and ions tend to recombine in this layer An increase in solar activity can disturb the radio communication as it increases the number of charged particles in the ionosphere.