| − | A large body of air with relatively uniform pressure, temperature, and humidity.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1990, 2000</ref> | + | A large body of air with relatively uniform pressure, temperature, and humidity.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> |