Q: Is a Pacific Ocean the largest and deepest of Earth's oceanic divisions? ¶
Q: Is a Pacific Ocean currently shrinking by roughly 2.5 cm per year on three sides? ¶
A: Yes, and roughly averaging 0.52 km2 a year.
Q: Was a Pacific Ocean made by the Portuguese expeditions of António de Abreu and Francisco Serrão? ¶
A: Yes, and via the Lesser Sunda Islands, to the Maluku Islands, in 1512, and with Jorge Álvares's expedition to southern China in 1513, both ordered by Afonso de Albuquerque from Malacca.
Q: Was a Pacific Ocean born 750 million years ago at the breakup of Rodinia? ¶
A: Yes, although it is generally called the Panthalassic Ocean until the breakup of Pangea, about 200 million years ago.
Q: Is a Pacific Ocean the only ocean which is almost totally bounded by subduction zones? ¶
Q: Is a Pacific Ocean of four basic types: continental islands? ¶
A: Yes, and high islands, coral reefs and uplifted coral platforms.