Evolution of the Atmosphere

Grade Levels
6th, 7th, 8th, 9th
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PRODUCT DESCRIPTION

A colorful 20-slide PowerPoint that serves as an introduction to the evolution of our atmosphere with a focus on how the composition of atmospheric gases changed over time.

Through text, pictures and animations, this presentation introduces numerous topics.

Contents:

- Definition of atmosphere
- Composition of our current atmosphere
- Composition of the early atmosphere
- Five changes that occurred to alter the atmosphere over time
- Cyanobacteria
- Photosynthesis
- Denitrification
- Ozone
- Future changes - climate change


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Terms of Use:

Copyright © Douglas Enns. All rights reserved by author. This product is to be used by the original downloader only. Copying for more than one teacher, classroom, department, school, or school system is prohibited. This product may not be distributed or displayed digitally for public view. Failure to comply is a copyright infringement and a violation of the Digital Millennium Copyright Act (DMCA). Clipart and elements found in this document are copyrighted and cannot be extracted and used outside of this file without permission or license. Intended for classroom and personal use ONLY.
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Evolution of the Atmosphere
Evolution of the Atmosphere
Evolution of the Atmosphere
Evolution of the Atmosphere
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