On a cool morning, Uyen’s breath can form a cloud when she breathes out. Which changes of state are most responsible for Uyen seeing her breath in this way? melting
condensation
deposition
sublimation

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.