This anomalous expansion of water is an abnormal property of water whereby it Cloze (1): JXUwMDNkJXUwMDFkJXUwMDA4JXUwMDExJXUwMDBmJXUwMDBhJXUwMDE3 instead of Cloze (2): JXUwMDNiJXUwMDBjJXUwMDAxJXUwMDFhJXUwMDA2JXUwMDEzJXUwMDAyJXUwMDE3JXUwMDFkJXUw MDA3JXUwMDA5 when the temperature decreases from Cloze (3): JXUwMDZjJXUwMDg0JXUwMGYz to Cloze (4): JXUwMDY4JXUwMDgwJXUwMGYz , and it becomes Cloze (5): JXUwMDM0JXUwMDA5JXUwMDE2JXUwMDAwJXUwMDUzJXUwMDQ0JXUwMDAxJXUwMDBiJXUwMDFkJXUw MDE2JXUwMDRi The density becomes Cloze (6): JXUwMDM0JXUwMDA5JXUwMDE2JXUwMDAw as it freezes because molecules of water normally form open crystal structures when in solid form. This is the reason why ice Cloze (7): JXUwMDNlJXUwMDBhJXUwMDAzJXUwMDBlJXUwMDE1JXUwMDA3 on water.Water has Cloze (8): JXUwMDM1JXUwMDBjJXUwMDE5JXUwMDExJXUwMDA0JXUwMDE4JXUwMDE4 density at 4°C.