In verses (21:30-32) ALLAH, subhanahu wa ta’ala, stated several scientific facts: (1) that all objects in the universe (heavens and earth) started as one entity, (2) HE then separated them, (3) all living things are made of water, (4) HE placed in earth mountains to provide balance and in earth HE made pathways to guide them, and (5) HE made the sky a protected ceiling.
Quran.com-Sahih International and Tenzil.net translated these verses as: Have those who disbelieved not considered that the heavens and the earth were a joined entity, and WE separated them and made from water every living thing? Then will they not believe? (21:30). And We placed within the earth firmly set mountains, lest it should shift with them, and WE made therein