Siteadmin, Check users, nsAm_Govt_101RO, nsAm_Govt_101RW, nsAm_Govt_101_ta, Administrators
2,684
edits
Changes
Jump to navigation
Jump to search
no edit summary
The lower layer of earth's atmosphere, which exists from ground level to roughly 80 kilometers (50 miles) above sea level.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>
==References==
<references/>
==References==
<references/>