Here is the correct arrangement of the words in the appropriate locations:
Important changes in the hydrosphere occur via the water cycle, in which water that is locked in : solid (glaciers, ice caps, and permafrost) melts. This produces : liquid (water), which fills the oceans, : rivers, and lakes of the world. This water then :: evaporates, becoming water vapor, which :: condenses into :: clouds and returns to the Earth's surface as : precipitation.