Let us read to find out! While you are reading list key points to share with a partner.
http://scienceline.ucsb.edu/getkey.php?key=826
Carbon Dioxide Oxygen Cycle
http://www.youtube.com/watch?v=xFE9o-c_pKg
Video - Let us watch and listen to find out
http://www.youtube.com/watch?v=KpgZG9T0y34
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