E.12.A.2 - Students know the composition of Earth's atmosphere has changed in the past and is changing today. Able to explain how variations in the ozone layer affect the amount of ultraviolet radiation entering Earth's atmosphere. Able to describe how life forms have affected the composition of the atmosphere over time. Able to describe how natural events have affected the composition of the atmosphere over time (volcanoes & meteorites).
Earth Science 17-1A - Sleeping Dog Studios - Atmospheric Characteristics Visit - www.sleepingdogstudios.com Click on Earth Science and find Atmospheric Characteristics - you may also dowload the questions/answer sheet to match the PowerPoint presentation