#REDIRECT ==Key Stage 3=====Meaning==='''Earth's Atmosphere''' is a [[mixture]] of [[gas]]es covering the surface of the [[Earth]]. ===About the Earth's Atmosphere==={| class="wikitable"|-|[[File:AtmosphericGases.png|center|400px]]|-| style="height:20px; width:200px; text-align:center;" |A [[Pie Chart]] showing the percentage of different [[gas]]s in the '''Earth's Atmosphere'''.|} : The '''Earth's Atmosphere''' is essential to the survival of many [[Alive|living]] [[creature]]s on the [[planet]].: The '''Earth's Atmosphere''' has not always had the same proportions of [[gas]]es. 3.9 [[billion]] [[year]]s ago there was no [[Oxygen]] in the [[atmosphere]]. In the last 200 years humans have caused the [[Carbon Dioxide]] in the '''Earth#'s Atmosphere''' to double. ==Key Stage 4=====Meaning==='''Earth's Atmosphere''' is a [[mixture]]of [[gas]]es covering the surface of the [[Earth]]. ===About the Earth's Atmosphere===