| − | '''Weather fronts''' occur at the boundaries of two dissimilar [[air]] masses.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> | + | '''Weather fronts''' is a meteorological occurrence, formed at the boundaries of two dissimilar (different) [[air]] masses.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> |