Earth’s Atmosphere • Contains the oxygen needed for life • Filters out much of the ultra violet radiation emitted from the Sun. • Holds surface heat to the Earth • Allows for weather (wind, rain) and water cycles • Protects the Earth from small meteorites
Earth’s Atmosphere layers • Made up of five distinct layers.
Atmosphere on other planets • What is their atmosphere composed of? • Does it have any layers? • Any special features? • How thick is the atmosphere?