The study aimed to know the effectiveness of teaching using virtual classrooms and flipped in developing achievement first-year secondary students subject history Qasr District. To achieve objectives study, quasi-experimental approach was adopted, where conducted on an experimental group consisting (23) who were taught through classes (22) by classrooms, choice intentional way, they distributed...

The high maximum and low for sea level in north west of Arabian Gulf the area next to Umm Qasr port were studied a nodal lunar cycle that equal nineteen years (1999 – 2017). It was found is rising. Depending on, monitoring years’ interval, essential characteristics Qasr's tidal range have been identified. This study addressed problems collective impact tides meteorological elements at level, mo...